Nicole recently switched her primary doctor to one specializing in caring for elderly patients. On her new doctor's website, it says that the mean systolic blood pressure among elderly females is 115 millimeters of mercury (mmHg). Nicole believes the value is actually higher. She bases her belief on a recently reported study of 18 randomly selected, elderly females. The sample mean systolic blood pressure was 124 mmHg, and the sample standard deviation was 22 mmHg.
Assume that the systolic blood pressures of elderly females are approximately normally distributed. Based on the study, at the 0.10 level of significance, can it be concluded that μ, the population mean systolic blood pressure among elderly females, is greater than 115 mmHg?

Perform a one-tailed test. Then complete the parts below.

Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.)

(a) State the null hypothesis H0 and the alternative hypothesis H1.
H0:
H1:
(b) Determine the type of test statistic to use.
▼(Choose one)
(c) Find the value of the test statistic. (Round to three or more decimal places.)

(d) Find the p-value. (Round to three or more decimal places.)

(e) Can it be concluded that the mean systolic blood pressure among elderly females is greater than 115 mmHg?
Yes No

Answer:

0.5

Step-by-step explanation:

6 mins & travelled 3 miles farther

so miles/min = 3/6 = 0.5 mile(s) per minute.

Answer:

3.2 × 10⁻⁸

Step-by-step explanation:

Scientific notation is written in the form [tex]a \times 10^n[/tex], where [tex]1 \leq a < 10[/tex] and [tex]n[/tex] is any positive or negative whole number.

To convert a number into scientific notation, move the decimal point to the left or right until there is one non-zero digit to the left of the decimal point.

The number of times you have moved the decimal point is the power of 10 (the value of n).

Therefore, to convert 0.000000032 to scientific notation, move the decimal point 8 places to the right so that [tex]a[/tex] is 3.2.

As the decimal point has been moved 8 places the right, the exponent of 10 is -8.

Therefore,  0.000000032 = 3.2 × 10⁻⁸.

For the function, [tex]f(x) = \frac{1 - x^2}{x - 1}[/tex] the Limit of f(x) as x approaches 1 does not exist.

A function can be defined as the outputs for a given set of inputs.

The inputs of a function are known as the independent variable and the outputs of a function are known as the dependent variable.

Given, [tex]f(x) = \frac{1 - x^2}{x - 1}[/tex], [tex]g(x) = \frac{x^2 - 5x + 6}{x - 3}[/tex].

We know, In a rational expression (p/q), q ≠ 0 as the expression would be undefined.

Therefore, The function for which the Limit of f(x) as x approaches 1 does not exist is [tex]f(x) = \frac{1 - x^2}{x - 1}[/tex], as at x = 1, f(x) is undefined.

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Answer:

Step-by-step explanation:

Let's say the enrollment in the Spanish class is x.

According to the information given, the enrollment in the French class is 0.72 of the enrollment in the Spanish class, which means the enrollment in the French class is 0.72x.

The enrollment compared to Spanish class as a fraction is 0.72x / x = 0.72.

The enrollment compared to Spanish class as a percent is 0.72 x 100% = 72%.

The solution is, The enrollment compared to Spanish class as a percent is

72%.

Here, we have,

Let's say the enrollment in the Spanish class is x.

According to the information given, the enrollment in the French class is 0.72 of the enrollment in the Spanish class, which means the enrollment in the French class is 0.72x.

The enrollment compared to Spanish class as a fraction is,

0.72x / x = 0.72.

The enrollment compared to Spanish class as a percent is,

0.72 x 100% = 72%.

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For the function y=f(x), the domain is (-2,2] and the range is (-2,3).

The corresponding values are -

f(-1) = -6, f(0) = -5, f(1) = 6, f(2) = 3.

What is a function?

In mathematics, a function is a unique arrangement of the inputs (also referred to as the domain) and their outputs (sometimes referred to as the codomain), where each input has exactly one output and the output can be linked to its input.

The graph for function y = f(x) is given.

The collection of input or argument values for which a function is actual and defined is known as its domain.

In the graph it can be seen that the graph is intersecting x-axis at x = -2 and at x = 2.

So, the domain is (-2,2]. The ( symbol denotes empty circle whereas the ] symbol denotes a filled circle.

A function's range is the collection of values for which the dependent variable is defined.

The coordinates for the ending of the graph is (2,3). So, the range of the function is [-2,3].

The value for f(-1) as seen in the graph is -

x = -1, then y = -6.

The value for f(0) as seen in the graph is -

x = 0, then y = -5.

The value for f(0) as seen in the graph is -

x = 1, then y = 6.

The value for f(2) as seen in the graph is -

x = 2, then y = 3.

Therefore, the domain and range is (-2,2] and (-2,3) respectively.

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The equation for Harper's situation is 10x = 150 + 5x. The number of t-shirts Harper needs to sell so that the amount of money she spends to start her business and the amount of money she earns are the same is 30 t-shirts.

What is an equation?

A mathematical definition of an equation is a claim that two expressions are equal when they are joined by the equals sign ("=").

The price of one plane t-shirt is = $5

The money spent on printing equipment is = $150

The price for printed t-shirt is = $10

Let the number of t-shirts to be sold be x.

The expression for earning money is 10x

The amount she spends on starting the business is -

150 + 5x

So, according to question the equation is -

10x = 150 + 5x

10x - 5x = 150

5x = 150

x = 150 / 5

x = 30

Therefore, 30 t-shirts needs to be sold.

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To find the area under the normal distribution between z = -0.30 and z = 0.90, you can use a standard normal distribution table or a calculator with a normal distribution function.

Using a standard normal distribution table:

Look up the area to the left of z = 0.90 in the standard normal distribution table. This will give you a value of 0.8159.

Look up the area to the left of z = -0.30 in the standard normal distribution table. This will give you a value of 0.3821.

Subtract the value from Step 2 from the value from Step 1 to find the area between z = -0.30 and z = 0.90:

Area = 0.8159 - 0.3821 = 0.4338

Using a calculator with a normal distribution function:

Use the normal distribution function on your calculator with a mean of 0 and a standard deviation of 1 to find the area to the left of z = 0.90. This will give you a value of 0.8159.

Use the normal distribution function on your calculator with a mean of 0 and a standard deviation of 1 to find the area to the left of z = -0.30. This will give you a value of 0.3821.

Subtract the value from Step 2 from the value from Step 1 to find the area between z = -0.30 and z = 0.90:

Area = 0.8159 - 0.3821 = 0.4338

Therefore, the area under the normal distribution between z = -0.30 and z = 0.90 is 0.4338.

finance charge Jack will​ pay is $1,512.

A value or ratio that may be stated as a fraction of 100 is referred to as a percentage in mathematics. If we need to compute a percentage of a number, we should divide it by its whole and then multiply it by 100. The proportion, therefore, refers to a component per hundred. Per 100 is what the term percent signifies. The letter "%" stands for it.

Given, Jack Fitzgerald wishes to purchase a used car that has a cash price of ​$11,000. The installment terms include a down payment of ​$2,000 and 48 monthly payments of ​$219.

a)

The amount that needs to be financed is = 11,000 - 2,000 = $9,000.

Amount repayment = 219 x 48 = $8,100.

=> Finance charge = Amount repayment - Amount needs to be financed

Finance charge = 10512 - 9000

Finance charge = 1,512$

b)

We apply the PV for annuity formula to find the interest rate per one month denoted as i:

Amount needs to be finance = (equal monthly installment x i) / [ 1 - (1+i)^-36 ]

or 9,000 = (219/i) x [1 - (1+i)^-48 ] <=> i = 0.911%.

APR = 12 x i

APR = 10.932% .

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The coefficients of the product are 25 and -30. Option A nd E

These are expressions that are composed of arithmetic or mathematical operations, such as;

They are also made up of variables, coefficients, terms, constants and factors.

Coefficients are numbers in the front of variables in the expression.

Given that;

(5y − 3)(5y -3 )

expand the bracket

25y² - 15y - 15y + 9

25y²  -30y + 9

Hence, the coefficients are 25 and - 30

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Rows of alpha are numbered 0...24 and columns are numbered 0...9 is the true statement about alpha.

What is alpha?

The first letter of the Greek alphabet is known as alpha. Alpha is typically used to signify an unidentified angle. Gamma, alpha, and beta are utilized as variables just as x, y, and z in mathematics. Mainly in quadratic problems, it is employed.

Since symbols are only meant for communication, you can create whatever you choose with them. It may take the form of a real number, vector, tensor, or index.

The rows of the alpha have to start from 0 so, the true statement lies in option a and option b.

Also, the columns are to be numbered till 9. So, the true statement lies in option a.

Hence, the true statement is that rows of alpha are numbered 0...24 and columns are numbered 0...9.

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The proportion of oil tankers that had spills is:

1 - (445/563) = 0.208

Rounded to three decimal places, the answer is 0.208. Alternatively, this can be expressed as the fraction 52/253.

Answer:

2x²+12x-32

Step-by-step explanation:

Based on the information, it can be inferred that Mhlaba food processor on offer is the right choice for Mhlaba due to its quality product.

According to the information, Mhlaba should buy a home food processor because he only needs to make small portions for himself and his family.

Therefore, there is no need for Mhlaba to look for another more professional food processor since he will not work as a cook nor will he require a large-capacity machine. Then he should choose the one on offer.

Note: This question is incomplete. Here is the complete information:

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The triangle has an area of 75 units² then the area of triangle be 15 units.

The space bounded by a triangle's three sides is known as the area of a triangle. The total area that is bounded by a triangle's three sides is referred to as the triangle's area.

Area of triangle = 1/2 (b h), where b is the base and h is the height, is the fundamental formula for calculating a triangle's area. The type of the triangle and the known dimensions can affect other formulas that are used to calculate the area of a triangle.

Let x be base of triangle

height = 19 units

Area of triangle = 1/2 base × height

substitute the values in the above equation, we get

75 = 1/2 × x × 10

simplifying the equation, we get

75 = x × 5

x = 75/5

x = 15 units

Therefore, the area of triangle be 15 units.

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The correct statement regarding the exponential functions is given as follows:

Since y-intercepts indicate the amount of each bacteria at the start of the experiment, there was more of bacteria B than bacteria A at the start.

An exponential function is defined as follows:

y = ab^(x/n).

In which the parameters are defined as follows:

For Bacteria A, we have that:

For Bacteria B, we have that:

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A coterminal angle of θ such that 0 ≤ θ ≤ 2π is 3π/4

A. A coterminal angle of θ such that 0 ≤ theta  ≤ 2π is

= theta + 2π

= -11π/4 + 2π

= 3π/4.

B. The exact values of the six trigonometric functions evaluated at θ are as follows:

sin(θ) = sin(-11π/4) = -√2/2

cosec (θ) = cosec (-11π/4) = -2/√2

cos(θ) = cos(-11π/4) = -√2/2

sec (θ) = sec (-11π/4) = -√2/2

tan(θ) = tan(-11π) = 1

cotan (θ) = cotan (-11π) = 1

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Let's start by setting up an equation to represent the situation:

59 + 57x = 15 + 79x

where x is the number of months it will take for both Thomas and Christian to have the same amount of money in their accounts.

Simplifying this equation, we get:

64x = 44

Dividing both sides by 64, we get:

x = 0.6875

So it will take approximately 0.6875 months for Thomas and Christian to have the same amount of money in their accounts. However, since time is measured in months, we cannot have a fraction of a month. Therefore, we round up the result to the nearest whole month and conclude that it will take 1 month for both Thomas and Christian to have the same amount of money in their accounts.

1. The algae blooms was larger initially is the first algae.

2. The first algae bloom is decreasing more quickly than the second algae bloom.

1. To determine which algae bloom was larger initially, we can compare the values of the functions at d=0.

For the first algae bloom, we have A(0) = 200.

For the second algae bloom, we have B(0) = 100*27⁰ = 100.

Therefore, the first algae bloom was larger initially.

2. To determine which algae bloom is decreasing more quickly, we can compare the rates of decrease of the two functions. The rate of decrease is given by the derivative of the function, which tells us how fast the area is changing with respect to time.

For the first algae bloom, we have A'(t) = -20e^(-0.2t).

For the second algae bloom, we have B'(d) = -100*27^(-1)d.

To compare these rates of decrease, we can evaluate them at the same point in time or days. Let's evaluate them at d=1, which means one day has passed since the first measurement.

For the first algae bloom, we have A'(1) = -20e^(-0.2) ≈ -15.24.

For the second algae bloom, we have B'(1) = -100*27^(-1) ≈ -3.70.

Therefore, we can see that the first algae bloom is decreasing more quickly than the second algae bloom. This is because the rate of decrease of the first bloom is more negative than the rate of decrease of the second bloom.

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The smallest number of blocks needed to build the wall is 350 blocks which are 1 foot high and either 2 feet long.

A rectangle is a two-dimensional shape where the length and width are different.

The area of a rectangle is given as:

Area = Length x width

We have,

Dimension of the wall.

Length = 100 feet

Height = 7 feet

Area = 100 x 7 = 700 ft²

Dimension of the larger block.

Length = 2 feet

Height = 1 feet

Area = 2 x 1 = 2 ft²

Dimension of the smaller block.

Length = 1 feet

Height = 1 feet

Area = 1 x 1 = 1 ft²

Now,

The number of smaller blocks needed to build the wall.

= 700

The number of larger blocks needed to build the wall.

= 700 / 2

= 350

Thus,

The smallest number of blocks needed is 350 blocks which are 1 foot high and either 2 feet long.

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On solving the provided question, we can say that by bodmas, Hardwood cost = 5.59*320 =  $1788.8 ; laminate cost = 2.89*320 = $924.8 and difference = 1788.8-924.8 = $864

The abbreviation BODMAS aids kids in recalling the hierarchy of mathematical operations (the correct order for solving math problems). The acronym BODMAS is made up of the following terms: B Bracket, O Degree (Power/Exponent or Root), D Division, M Multiplication, A Addition, and S Subtraction. BODMAS is also referred to as PEDMAS in some locales. This symbolizes exponents, division, multiplication, addition, and subtraction. It also represents parentheses. The BODMAS rule states that parentheses must be handled first, followed by powers or roots (i.e., of), divisions, multiplications, additions, and lastly subtractions. While he is known as BODMAS in India and the UK, PEMDAS is primarily utilized in the US. However, they are identical to one another. The parentheses, order, and order of the operations of addition, subtraction, multiplication, and division are the same for the two rules.

A room addition requires 320 sq ft

Hardwood costs $5.59 per sq ft.

laminate costs $2.89 per sq ft.

Hardwood cost = 5.59*320 =  $1788.8

laminate cost = 2.89*320 = $924.8

difference = 1788.8-924.8 = $864

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Answer:

Year | Rate | Interest (9%) | Principal Invested | Final Value

1 | 9% | 52.20 | 580.00 | 632.20

2 | 9% | 56.94 | 580.00 | 688.14

Answer:

An average of 70.8 miles per hour

Step-by-step explanation:

Answer:

42

Step-by-step explanation:

6*4+3*6= 42

Answer:

42

Step-by-step explanation:

6*4+3*6=42

Answer: It´s about 14.96 gallons per square foot with 55 square foot area and 2 feet height

Step-by-step explanation:

In 1/3 portion Jocelyn planted the carrots.

The fractional bar is a horizontal bar that divides the numerator and denominator of every fraction into these two halves.

Given:

Jocelyn has 4/6 of her rectangular garden.

She plant carrots in 1/2of the portion available for vegetables.

So, the fraction of Carrot Jocelyn plants

= 4/6 x 1/2

= 2/6

= 1/3

Hence, 1/3 portion is used.

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Answer:

0.0588

Step-by-step explanation:

There are 52 cards total in a pack of cards.

There are 13 diamond cards in a pack of card

When the first card is dealt, it is NOT replaced. When the second card is dealt, it is NOT replaced

In probability:

AND = multiplication

  OR = addition

Probability = [tex]\frac{Total number of diamond cards}{Total number of cards}[/tex]

Probability that both friends for diamonds:

First card is DIAMONDS AND second card is DIAMONDS:

= [tex]\frac{13}{52}[/tex]×[tex]\frac{12}{51}[/tex]

= [tex]\frac{156}{2652}[/tex]

= 0.0588 (Rounded off to 3 significant figures)

A fraction is a fragment of a whole number, used to define parts of a whole. The whole can be a whole object, or many different objects. The number at the top of the line is called the numerator, whereas the bottom is called the denominator.

To figure out what fraction of the toys are blue, we need to convert all of the fractions to have a common denominator.

A common denominator consists of two or more fractions that have the same denominator. This makes it easier to perform numeric equations, and to solve them.

Looking at the fractions, we can see that there are 3 fractions, [tex]\frac{1}{8}, \frac{1}{4}[/tex] and [tex]\frac{3}{5}[/tex].

To solve for the common denominator between [tex]\frac{1}{8}[/tex] and [tex]\frac{3}{5}[/tex], we first multiply the denominators, 8 and 5.

We now know that the denominator is going to be 40.

To get the numerators, we can use these equations:

The new fractions look like this:

To easily convert the last fraction ([tex]\frac{1}{4}[/tex]) we can multiply the numerator and denominator by 10.

We multiply by 10 because the denominator, which is 4, can be multiplied by 10 to get our common denominator of 40.

Now, we have our 3 fractions converted to have common denominators.

([tex]\frac{5}{40}, \frac{24}{40}[/tex] and [tex]\frac{10}{40}[/tex])

(Yellow, red, and green)

We can now add these up and see what fraction of blue is remaining.

Therefore, the fraction of blue toys compared to the total amount is [tex]\frac{1}{40}[/tex].

If there are 100 green toys resulting in [tex]\frac{10}{40}[/tex] of all the toys, we can divide 100 by 10 to get the number of blue toys.

We divide by 10 because [tex]\frac{1}{40}[/tex] is only [tex]\frac{1}{10}[/tex] of [tex]\frac{10}{40}[/tex], meaning we divide by 10.

Therefore, there are 10 blue toys.

Answer:

1/4=100

10/40=100

40/40=400

1/8=400/8=50

3/5=400/5*3=240

400-100-50-240=10

10 of the toys are blue

Hope this helped!!

Step-by-step explanation:

Answer:

Therefore, you will need to order approximately 9.07 cubic yards of topsoil to fill the garden to a depth of 6 inches.

Step-by-step explanation:

To calculate the amount of topsoil needed, we need to find the volume of the garden in cubic yards, since topsoil is sold by the cubic yard.

The garden is 35 feet by 14 feet and 6 inches (or 0.5 feet) deep.

Volume of the garden = length x width x depth

= 35 feet x 14 feet x 0.5 feet

= 245 cubic feet

To convert cubic feet to cubic yards, we divide by 27 (since 1 cubic yard = 27 cubic feet):

Volume in cubic yards = 245 cubic feet / 27

= 9.07 cubic yards (rounded to two decimal places)

Therefore, you will need to order approximately 9.07 cubic yards of topsoil to fill the garden to a depth of 6 inches.

Answer:

Step-by-step explanation:

PART A: No, the trinomial 4x^3 + 28x + 49 is not a perfect square trinomial. To be a perfect square trinomial, the first and last terms must be perfect squares and the middle term must be twice the product of the square roots of the first and last terms. In this case, the first and last terms are not perfect squares, and the middle term is not twice the product of the square roots of the first and last terms.

PART B: To factor the expression 6x^2 + 5x - 4, we need to find two binomials whose product is equal to this expression.

First, we can break down the coefficient of x into two numbers whose product is 6 * (-4) = -24 and whose sum is 5. These numbers are 8 and -3.

Next, we use these two numbers to split the middle term 5x into two terms:

6x^2 + 8x - 3x - 4

We can now factor the expression by grouping:

(6x^2 + 8x) - (3x + 4)

2x(3x + 4) - 1(3x + 4)

(2x - 1)(3x + 4)

Therefore, the area of the rectangle can be factored as (2x - 1)(3x + 4).

To determine the dimensions of the rectangle, we set each factor equal to one of the dimensions and solve for the other dimension:

2x - 1 = length

3x + 4 = width

Alternatively, we could switch the factors and get the same answer:

2x - 1 = width

3x + 4 = length

Either way, these are the dimensions of the rectangle, expressed in terms of x.