Find the area of a semicircle with diameter 9 cm

Answers

Answer 1

Answer:

31.8  cm^2

Step-by-step explanation:

Area of WHOLE circle  = pi r^2

semicircle is 1/2 of this    ( r = 1/2 of the diameter)

  1/2 pi r^2

  1/2 pi  (9/2)^2 =


Related Questions


13. What is the equation in standard form of the circle
represented by
x2 + y2 - 10x - 6y = 23?
A (x+5)2+(y + 3)2 = 23
B. (x + 5)2+(y + 3)2 = 57
C. (x-5)+(y - 3)2 = 23
D. (x - 5)2+(y - 3)2 = 57

Answers

The standard form of a circle shows the center and the radius

The equation of the circle in standard form is (x + 5)^2 + (y - 4)^2 = 57

How to determine the equation?

The standard equation of a circle is:

(x - a)^2 + (y - b)^2 = r^2

Where:

Center= (a,b)

Radius = r

Assume that:

(a,b) = (-5,3)

r = [tex]\sqrt{[/tex]57

The equation of the circle would be:

(x + 5)^2 + (y - 4)^2 = ([tex]\sqrt{57[/tex])^2

Evaluate the exponent

(x + 5)^2 + (y - 4)^2 = 57

Hence, the equation of the circle in standard form is (x + 5)^2 + (y - 4)^2 = 57

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A person places $81200 in an investment account earning an annual rate of 3. 6%, compounded continuously. Using the formula V = Pe^{rt}V=Pe rt , where V is the value of the account in t years, P is the principal initially invested, e is the base of a natural logarithm, and r is the rate of interest, determine the amount of money, to the nearest cent, in the account after 13 years

Answers

[tex]~~~~~~ \textit{Continuously Compounding Interest Earned Amount} \\\\ A=Pe^{rt}\qquad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill & \$81200\\ r=rate\to 3.6\%\to \frac{3.6}{100}\dotfill &0.036\\ t=years\dotfill &13 \end{cases} \\\\\\ A=81200e^{0.036\cdot 13}\implies A=81200e^{0.468}\implies A\approx 129659.95[/tex]

The half-life of sr-85, which may be used in bone scans, is 64. 8 days. How many milligrams of a 7 mg sample will be left after 127 days? round to the hundredths place

Answers

[tex]\textit{Amount for Exponential Decay using Half-Life} \\\\ A=P\left( \frac{1}{2} \right)^{\frac{t}{h}}\qquad \begin{cases} A=\textit{current amount}\\ P=\textit{initial amount}\dotfill &7\\ t=\textit{elapsed time}\dotfill &127\\ h=\textit{half-life}\dotfill &64.8 \end{cases} \\\\\\ A=7\left( \frac{1}{2} \right)^{\frac{127}{64.8}}\implies A=7\left( \frac{1}{2} \right)^{\frac{635}{324}}\implies A\approx 1.80[/tex]

The half-life of sr-85, which may be used in bone scans, is 64.8 days. 1.80 milligrams of a 7 mg sample will be left after 127 days.

What is half-life?

Half-life is defined as the time required for a quantity to reduce to half of its initial value.

The half-life of sr-85, which may be used in bone scans, is 64. 8 days.

We need to find how many milligrams of a 7 mg sample will be left after 127 days.

[tex]\rm A = P\frac{1}{2} ^{t/h}[/tex]

here A = current amount

P = inital amount

t = time

h = half life

So,

[tex]\rm A = 7\frac{1}{2} ^{127/64.8}[/tex]

[tex]\rm A = 7\frac{1}{2} ^{635/324}\\A = 1.80[/tex]

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#SPJ4

What is the answer to this equation
3 1/2 - 27/8

Answers

Answer:

1/8

Change 27/8 into a mixed number 3 3/8

Answer: 1/8

Step-by-step explanation: I explain in the photo ! have a good day

Find the value of x.?

Answers

Your answer is ≈ 19

Step-by-step explanation:

180 - 124 = 56

56 / 3 = 18.66666666666667

18.66666666666667 round it up...…

19

X = 19

Hope this helps! Please let me know if you need more help or think my answer is incorrect. Brainliest would be MUCH appreciated. Have a wonderful day!

2 Which set of side lengths will form a triangle?
16 ft, 4 ft, 21 ft.
6 30 ft, 30 ft, 60 ft
12 ft, 12 ft, 20 ft
3ft, 5 ft, 10 ft

Answers

None of the above. To form a standard triangle, all 3 sides must be of equal length.

Let f(x)=3x-4 and g(x)=x^2-5. Find f(g(3))

Answers

Answer:

8

Step-by-step explanation:

A university class has had 8 graduate students enroll so far, as well as 8 other students. Considering this data, how many of the next 12 students to enroll should you expect to be graduate students?

Answers

[tex]\bold{ANSWER:}[/tex]

6 Students

[tex]\bold{EXPLANATIONS:}[/tex]

A rock is dropped from a height of 100 feet. Calculate the time between when the rock was dropped and when it landed. If we choose "down" as positive and ignore air friction, the
function is h(t) = 16t^2 – 100.

A)t = 2.5 seconds

B)t = 6.25 seconds

C)t = 10 seconds

D)t = 12.5

Answers

Answer:

A

Step-by-step explanation:

the rock lands when it reaches height 0.

so, for what t is h(t) = 0 ?

16t² - 100 = 0

16t² = 100

now we pull the square root on both sides (we can ignore the negative solutions, as negative seconds don't make any sense in our scenario)

4t = 10

t = 10/4 = 5/2 = 2.5 seconds

so, A is correct.

Which of the following statements is equivalent to P (z greater-than-or-equal-to 1. 7)? P (z greater-than-or-equal-to negative 1. 7) 1 minus P (z greater-than-or-equal-to negative 1. 7) P (z less-than-or-equal-to 1. 7) 1 minus P (z less-than-or-equal-to 1. 7).

Answers

This [tex]\rm P(Z\geq 1.7)[/tex]  is equivalent to  [tex]\rm 1-P(Z\leq 1.7)[/tex]

It is given that the  [tex]\rm P(Z\geq 1.7)[/tex]

It is required to find which statement is equivalent to [tex]\rm P(Z\geq 1.7)[/tex]

The statements are:

[tex]a) \ \rm P(Z\geq -1.7)\\b) \ \rm 1-P(Z\geq -1.7)\\c) \ \rm P(Z\leq 1.7)\\d) \ \rm 1-P(Z\leq 1.7)[/tex]

What is a normal distribution?

It is defined as the continuous distribution probability curve which is most likely symmetric around the mean. At Z=0, the probability is 50-50% on the Z curve. It is also called a bell-shaped curve.

We have the [tex]\rm P(Z\geq 1.7)[/tex]

We know that:

[tex]\rm P(Z\leq a)=P(Z\geq -a)\\\rm P(Z\geq a)=P(Z\leq -a)[/tex]

If we compare statement (a) and statement (c), we will see these options are not equivalent to  [tex]\rm P(Z\geq 1.7)[/tex]

For statement (b) if we plot the graph for the given statement we will get the negative area of the bell curve hence it is also incorrect.

For statement (d) if we plot the graph for the given statement we will get the positive area which is equivalent to the [tex]\rm P(Z\geq 1.7)[/tex]

Thus, the [tex]\rm P(Z\geq 1.7)[/tex]  is equivalent to  [tex]\rm 1-P(Z\leq 1.7)[/tex]

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Describe how to find the sale price of an item that has been discounted 15%.

Answers

Answer:

Convert 15% to a regular number by moving the decimal 2 times to the left so 15.0 becomes 0.15 then do 0.15 × the original price, then take the original price and subtract the amount you got from doing 0.15 × the original price

Please I really need help!? NOW!! Will give brainest!!

Answers

Answer:

the figure is a rectangle with a side of trapezium

according to my calculation the answer is

196m²

explanation

Area of trapezium =½(10+8)×4=36

Area of rectangle =10×16=160

add=160+36

therefore the answer is 196m²

What is question c in the question?

Answers

Answer:

y = [tex]4^{10}[/tex]

or

y = 1048576

Step-by-step explanation:

Function:

y = [tex]q^{x}[/tex]

Given values:

q = 4

x = 10

Substitute the given values into the function:

y = [tex]4^{10}[/tex]

or

y = 1048576

hope this helps and is right!! p.s. i really need brainliest :)

PLEASE HELP What is the area of the trapezoid?

Answers

36

Step by step explanation:




Answer:

Step-by-step explanation:

[tex]\text{Area of trapezoid = $\dfrac{(a+b)*h}{2}$}[/tex]

a and b are the length of the parallel sides.

a = 8 + 4 + 4 = 16 in

b = 8 in

h = height  = 6 in

[tex]Area = \dfrac{(8+16)*6}{2}\\\\\\=\dfrac{24*6}{2}\\\\=24*3\\\\= 72 \ in^{2}[/tex]

Use the equation from the previous problem to predict the price of bzg stock on day 30.

Answers

Answer:

925.798

Step-by-step explanation:

1.65(x) x 18.703 = 925.798

Which subtraction equation shows how to subtract
4
2
12

2
8
12
using equivalent fractions?
A.
42
12

28
12
B.
18
12

22
12
C.
50
12

32
12
D.
48
12

24
12

Answers

How do I subtract a fraction from a whole number? Take the LCM of denominator of both the fractions (the denominator of whole number is one). Then, in both the numbers divide the LCM by the denominator and multiply the result by the numerator. Subtract the numbers in numerators and you will get your answer.

Please Help! will Give Brainlest!

Answers

Answer:

tan ¤ = opp/adj

tan ¤ = 20/50

since opposite of the angle is 20, height of the tree is 20 feet.

Ans : D

Answer:

height : 20distance : 50

Explanation:

[tex]\sf tan(x)= \dfrac{opposite}{adjacent}[/tex]

[tex]\hookrightarrow \sf tan(x)= \dfrac{20}{50}[/tex]

using the equation, we can identify that ↓opposite ( the height of the tree ) is 20adjacent ( the distance ) is 50

Please help I am not understanding

Answers

Answer:

12.39cm

Step-by-step explanation:

cos 25°=AB/12.5

AB=12.5 cos 25°

cos 25°=0.9912

AB=12.5×0.9912

=12.39cm

Fill in the table using this function rule.
-
y=6x-1
х
у
1
4
5
10
0

Answers

Answer:

Below

Step-by-step explanation:

According to a website, ebra

Solve for

N

by cross multiplying.

N

=

5

Tap to view steps...

Solve for s

Isolate the variable by dividing each side by factors that don't contain the variable.

s

=

8

r

5

t

Tap to view steps...

Solve for x

Isolate the variable by dividing each side by factors that don't contain the variable.

Inequality Form:

x

>

6

Interval Notation:

(

6

,

)

Tap to view steps...

Solve by Substitution

Move all terms that don't contain

x

to the right side and solve.

x

=

9

2

y

2

Tap to view steps...

3/31/2022 4:07 PM

How can I help you?

Tap to view tutorial...

Find the Function

Find the function by taking the integral of the derivative.

G

(

x

)

=

5

2

x

2

x

+

C

Tap to view steps...

How was this solution?

Tap to rate...

Find the Function

I am unable to solve this problem.

Tap for examples...

Tired of typing? Download the app to take a picture of your problems!

Find the Function Rule

The chosen topic is not meant for use with this type of problem. Try the examples below.

x

q

(

x

)

1

1

2

2

3

3

4

4

x

q

(

x

)

1

3

2

6

3

11

4

18

x

q

(

x

)

1

2

9

162

2

8

8

128

3

18

Which graph represents the function f(x) = - |x - 2| - 1?

Answers

Answer:

nsgs6

68÷9

02_3

73929

Step-by-step explanation:

8282×627=628373

Answer:

i hope this helps you!

Step-by-step explanation:


The numbers in the triangles below go together following the
4
9
8
7
3
2
6
Find the missing number.
A 1
B 3

Answers

Answer:

1

by looking only 1 is missing

If f(x) = 5x^5 + 1, then what is the remainder when f(x) is divided by x + 1?

Answers

Answer:

2l

Step-by-step explanation:

hence.f10 divido 8-2

Deandre Willis is single and owns a hair salon. He has calculated the following assets and liabilities. Find DeAndre‘s net worth.

ASSETS
- current value of the hair salon: $180,000
- current value of car: $12,500
- checking account balance: $1,300
- combined savings: $18,000
- balance in retirement account: $30,000
- current value of owned electronics: $20,000

LIABILITIES
- remaining balance on mortgage: $120,000
- remaining balance on personal loan: $4,600
- combined credit card debt: $23,000

Answers

Given the value of DeAndre‘s assets and liabilities, his net worth is $114,200.

What is the net worth?

Net worth is the value of the assets less the liabilities.

Net worth = assets - liabilities

Assets = $180,000 + $12,500 +  $1,300 + $18,000 + $30,000 + $20,000= $261,800

Liabilities = $120,000 + $4,600 + $23,000 = $147,600

Net worth = $261,800 -  $147,600 = $114,200

To learn more about liabilities, please check: https://brainly.com/question/26513242

WILL GET BRAINLIEST!!!!!!​

Answers

Answer:

d=8

e=11.31

Step-by-step explanation:

side8 and side(d) are the same length

8squared+8squared=128

[tex]\sqrt{128}[/tex]=11.31

hope this helps!

Answer:

d = 8 and e = 8√2   ( e = 11.31 do the nearest hundredth)

Step-by-step explanation:

This is a 45-45-90 triangle so the sides are in the ratio 1:1:√2

So d = 8

and

e = 8√2.

PLEASE READ THE PICTURE
Let g be a reflection in the x-axis, followed by a translation 4 units down of f(x). Write a rule for g described by the transformations of the graph of f. Please show work and I will mark Brainliest!

Answers

f(x)
-5¾-3-4 that correct

You work in the mayor’s office and you are providing the mayor with a list of talking points for a speech. In your town, 13
1
3
of the residents live in rented dwellings. Of those who live in rented dwellings, 12
1
2
are in families with school-age children. On your list of talking points, what fraction of the residents should you list as living both in rented dwellings and in families with school-age children?

Answers

Answer:12/13

Step-by-step explanation:12/13

A taxi ride cost a flat fee of 4. 00 plus an additional 1. 25 per mile how many mile would a person travel if they paid 19. 0

Answers

Answer:

12 miles

Step-by-step explanation:

19 - 4 = 15

15/1.25 = 12

Mark has two summer jobs he babysits and helps with the gardening he works at each job three days a week and I was a total of 240 Mark has two summer jobs he babysits and helps with the gardening he works at each job three days a week and I was a total of 240 the table shows his earnings each day how much money does he earn each day babysitting

Answers

Answer:

$5.71 a day

Step-by-step explanation:

240/6 = 40

40/7 = 5.71428571429

Round 5.71428571429 = 5.71

Please help!


Find the value of x. Round to the nearest tenth for numbers #19.


Find the value of x. Round to the nearest degree # 23 & #27.


-Answer the last question :)

LAST QUESTION: The lengths of the diagonals of a rhombus are 2in. and 5in. Find the measures of the angles of the rhombus to the nearest degree.

Answers

The values of x in the triangles and the angles in the rhombus are illustrations of tangent ratios

The values of x in the triangles are 21.4 units, 58 degrees and 66 degreesThe angles in the rhombus are 44 and 46 degrees, respectively

How to determine the values of x?

Triangle 1

The value of x is calculated using the following tangent ratio

tan(25) = 10/x

Make x the subject

x = 10/tan(25)

Evaluate

x = 21.4

Triangle 2

The value of x is calculated using the following tangent ratio

tan(x) = 8/5

Evaluate the quotient

tan(x) = 1.6

Take the arc tan of both sides

x = arctan(1.6)

Evaluate

x = 58

Triangle 3

The value of x is calculated using the following tangent ratio

tan(x) = 0.34/0.15

Evaluate the quotient

tan(x) = 2.27

Take the arc tan of both sides

x = arctan(2.27)

Evaluate

x = 66

How to calculate the angles of the rhombus?

The lengths of the diagonals are:

L1 = 2 in

L2 = 5 in

Represent the angles with x and y.

The measures of the angles are calculated using the following tangent ratios

tan(0.5x) = 2/5 and y = 90 - x

Evaluate the quotient

tan(0.5x) = 0.4

Take the arc tan of both sides

0.5x = arctan(0.4)

Evaluate

0.5x = 22

Divide by 0.5

x = 44

Recall that:

y = 90 - x

This gives

y = 90 - 44

Evaluate

y = 46

Hence, the angles in the rhombus are 44 and 46 degrees, respectively

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a locker requires a three-digit code to open the lock. the code must contain one letter and two numbers, and no letter or number can be repeated. you can choose from among four letters, a,b,c and d and two numbers, 5 and 6

Answers

Answer:

4 ways

Step-by-step explanation:

Given

Code consists of 3 digits1 letter and 2 numbersNo number/letter should be repeated

Possible combinations

a56b56c56d564 ways
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Consider a right triangle with a side of length x opposite angle A, a side of length y opposite angle B, and a hypotenuse of length z opposite the right angle. If [tex]sinB=1/sqrt(3)[/tex] and x=8, find the length of the other side (y) and the length of the hypotenuse (z). Why is it very difficult to hold a specific person in Texas government responsible for anything?1.The media in Texas do a very poor job at investigating wrongdoing in government.2.Most officials usually cite the Fifth Amendment of the Constitution and refuse to say anything that could incriminate them.3.The state constitution shields all government employees from responsibility for public actions and policies.4.Many important policy changes have been blocked by the state courts.5.Government is fragmented and policy responsibility is divided. In poetry, meter is the pattern of How many grams does 5 helium atoms weigh? Rectangle A'B'C'D' is the image of rectangle ABCD after it has been translated according to the rule T4, 3(x, y).On a coordinate plane, a rectangles has points A prime (negative 5, 4), B prime (3, 4), C prime (3, 1), and D prime (negative 5, 1).Which points are vertices of the pre-image, rectangle ABCD? Select four options.(1, 2)(7, 1)(1, 7)(1, 1)(7, 2) which value is a solution for the inequality 9 _> 1/2 x?helpppp pls help, asap, explain, thxa^2-b^2=8a+2=2then a-b=? Gramarica Apresent tense of -er and -ir verbs The sum of three consecutive odd integers is 39. Find the three integers. Identify the Gerund in the following sentence: Getting up early in the morning is sometimes a challenge. what is the answer please i need help asap FIND THE VOLUME OF EACH SNOWBALL) Joshua and Isabella are having a snowball fight. Joshua has a snowball, shaped as a sphere, with a radius of 6 cm. Isabella also has a spherical snowball that is 6cm across the center of the sphere find the volume of each snowball use 3.14 for pi list some of Your Constitutional responsibilities Find the area of the unshaded region. Why does an increase in urbanization increase crime? What is the surface area? 5 cm 7 cm 4 cm square centimeters find the simple interest on $6000 invested for 8 years at 4% Which keywords/phrases would an author use for cause and effect? Which of these describes thecomposition of the nucleus of acomet's head?A. fuzzy outer layerB. solid inner coreC. gas and dust trailD. comet's atmosphereh Provide 5 examples each of firms and the respective goods they produce in - Perfect competition -Oligopoly - Monopoly - Monopolistic competition - Effective competition