In a survey, 31 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $33 and a standard deviation of $16. Construct a confidence interval at a 98% confidence level.

Give your answers to one decimal place​

Answers

Answer 1

Answer:

The margin of error is 5. 00 


Related Questions

0.3 - 0.04 = i need it ASAP

Answers

0.3-0.04=0.26, basically you subtract it

Geometry A. In unit 2, you learned three different criteria for proving triangle congruence: ASA, SAS, and SSS. Can you give me the summarize each of them for me? 100 POINTS

Answers

Answer:

we use the ASA when a triangle is conguerent by angle,side,angle.

SAS se when atriangle is conguerent by side,angle,side

sss when the triangle is conguerent by side,side,side

Answer:

ASA- The Angle-Side-Angle Postulate (ASA) states that if two angles and the included side of one triangle are congruent to two angles and the included side of another triangle, then the two triangles are congruent.

SAS- is a rule used to prove whether a given set of triangles are congruent. The SAS rule states that: If two sides and the included angle of one triangle are equal to two sides and included angle of another triangle, then the triangles are congruent.

SSS- If two triangles are congruent it means that all corresponding angle pairs and all corresponding sides are congruent. The SSS criterion for triangle congruence states that if two triangles have three pairs of congruent sides, then the triangles are congruent

Step-by-step explanation:

3 How many more cake
pops does the neighbor need to sell so that Callie can make a
profit of $5.00? Show
your
work.

Answers

Answer:

you didint explainded well

Step-by-step explanation:

Subtract 7−5x from 2−3x . What is the difference?

Answers

Answer:

7−5x from 2−3x

Step-by-step explanation:

you flip them and get 2−3x 7−5x. try it that way...

i forgot to bring a piece of paper, im on the road

I need some help with this and with the other 6 question! Help this girl in need

Answers

Answer:

i think it is y=15x-6

Step-by-step explanation:

if it is correct plz plz mark as brainliest

thank you

19NBoli

Answer:

y = 2x-6

Step-by-step explanation:

Slope intercept form:

y = mx+b

m = slope

In this case the slope is 2/1 or 2.

b = The point where the line crosses the y-axis

In this case -6 is the exact point the line crosses the y-axis

So if you put it all together you get the answer of:

y = 2x-6

I hope this helped!

P.S. I am so sorry I couldn't respond earlier :(

Sincerely,

Rekifromsk8theinfinity

:D

sketch the graph of each function. Then State the domain, range and increasing, decreasing intervals. Part 3. ​

Answers

Answer:

19) Domain: - ∞ < x < ∞                    20) Domain:  - ∞ < x < ∞

Range: - ∞ < y < ∞                                  Range: - ∞ < y < ∞

Increases throughout                            Decreases throughout

Step-by-step explanation:

Given the parent function " y = ∛x" we know that the first graph should have a vertical shift down 2 units, and a horizontal shift 4 units to the right. There is no vertical stretch since there is no coefficient. (Check first graph)

Domain: - ∞ < x < ∞

Range: - ∞ < y < ∞

Increases throughout

______________________________

For the second graph there should be a vertical shift down three units, a horizontal shift 1 unit to the left, and a vertical stretch by a factor of - 1. (Check second graph)

Domain: - ∞ < x < ∞

Range: - ∞ < y < ∞

Decreases throughout

Which set of values for x makes the inequality 12−x<7 true

Answers

Answer:

[tex]\{x:x>5\}[/tex]

Step-by-step explanation:

Given

[tex]12 - x < 7[/tex]

Required

Values of x that make it true

First: solve the inequality.

[tex]12 - x < 7[/tex]

Collect Like Terms

[tex]- x < 7-12[/tex]

[tex]- x < -5[/tex]

Multiply both sides by -1

[tex]-1 * - x < -5 * -1[/tex]

[tex]x > 5[/tex] --- The inequality changes when multiplied by a negative value

So, the solution implies that the value of x is greater than 5 (i.e. 6, 7, 8..)

Hence, the set is:

[tex]\{x:x>5\}[/tex]

Write an equation that is parallel to y=3x+5 and passes through the point (-4,-13).

Answers

Answer:

y = 3x - 1

Step-by-step explanation:

Please let me know if you want me to add an explanation.

y = mx + b
y = 3x + 5

m = 3 but its parallel so m =-¹/₃

y-y₁ = m (x-x₁)

y - (-13) = -¹/₃ (x-(-4) )

y + 13 = -¹/₃ (x+4)

y + 13 = -¹/₃x - ⁴/₃

y = -¹/₃x - ⁴/₃ -13

y =-¹/₃x - ⁴³/₃

Find the curved surface area of a cylinder if it's base circumference is 36 cm and it's height is 4 cm​

Answers

Answer:

CSA of a cylinder = 144cm²

Step-by-step explanation:

Given the following data;

Base circumference = 36cm

Height = 4cm

To find the curved surface area (CSA) of the cylinder;

CSA of a cylinder = 2πr * h

But 2πr = 36cm

Substituting the values into the equation, we have;

CSA of a cylinder = 36 * 4

CSA of a cylinder = 144cm²

What is the answer to the question?

Answers

Answer:

exponential function i think

Step-by-step explanation:

Choose the graph of the inequality x> -2
Choose 1 answer. HELPPPP

Answers

Step-by-step explanation:

step 1. x > -2 means numbers greater than -2 but not including -2.

step 2. you graph a single variable on a number line.

step 3. the graph would include an open circle above -2 (not equal to -2)

step 4. the line would go right of the open circle (greater than) and have an arrow at the end.

step 5. the answer is b.

PLS HELP TIMED QUESTION!!!
A quantity with an initial value of 9800 decays exponentially at a rate such that the quantity cuts in half every 6 days. What is the value of the quantity after 138 hours, to the nearest hundredth?

Answers

Answer:

About 5043.58

Step-by-step explanation:

The standard form for an exponential decay after t time is:

[tex]\displaystyle f(t)=a(r)^{t/d}[/tex]

Where a is the initial value, r is the rate decay, t is the time that has passed, and d is the amount of time it takes for 1 cycle.

The initial value is 9800. So a = 9800.

The quantity cuts in half. So, r = 1/2.

And it cuts in half every 6 days. For this question, we will convert this to hours. 6 days = 144 hours. So, we can let d = 144, where t will be in hours.

Therefore, our function is:

[tex]\displaystyle f(t)=9800\Big(\frac{1}{2}\Big)^{t/144}[/tex]

Where t is the amount of time that has passed, in hours.

Then the quantity left after 138 hours will be:

[tex]\displaystyle f(138)=9800\Big(\frac{1}{2}\Big)^{138/144}\approx 5043.58[/tex]

What type of function is f(x)=2(1/7)^x?
Linear
Exponential Decay
Exponential Growth
None of the Above

Answers

Answer:

B) Exp. Decay

Step-by-step explanation:

Because the term getting raised to a power is under 1, the function immediately starts going down and approaches negative infinity as x approaches infinity.

The type of function is f(x)=2(1/7)^x is Exponential Decay, the correct option is B.

What is a function?

Function is a type of relation, or rule, that maps one input to specific single output.

In mathematics, a function is an expression, rule, or law that describes the relationship between one variable (the independent variable) and another variable (the dependent variable) (the dependent variable). In mathematics and the physical sciences, functions are indispensable for formulating physical relationships.

Linear function is a function whose graph is a straight line

We are given that;

Function; f(x)=2(1/7)^x

Now,

The function has the form f(x)=abx

where a and b are constants and b is between 0 and 1. In this case, a is 2 and b is 1/7, which is less than 1. This means that the function decreases as x increases.

Therefore, by the given function the answer will be Exponential Decay.

Learn more about function here:

https://brainly.com/question/2253924

#SPJ2

I need to know the answer ASAP

Answers

Q1) 20 minutes past 8

Q2) Four O’clock

Hi! Please i need your help!. Thank you to those who help and answer correctly

Answers

Answer:

I believe there are 5

Step-by-step explanation:

if there are 4 friends and Mary then that makes 5 people in total.

Partners would be 4 including Mary would then make a 5 team

Whoever is awake I need help with math points and brainlest

Answers

Answer:

the first one or A. hope this helps.

Step-by-step explanation:

The tax on a $50 item is $3.00.
Find the tax on a $140 item.​

Answers

Answer:

The tax is 6% of the item. 140*0.06=$8.40

Step-by-step explanation:

Answer:

$8.40

Step-by-step explanation:

3÷50=.06

.06*140=8.4

Plzzz helpppppp!!!!!!

Answers

Answer:

(c) [tex]h(3) = 1[/tex]

Step-by-step explanation:

Given

The attached graph

Required

Find h(3)

The formula to use in solving this is:

[tex]y = h(x)[/tex]

Substitute 3 for x

[tex]y = h(3)[/tex]

From the attached graph, the value od x = 3 points to the value of y = 1.

So, we have:

[tex]y = 1[/tex]

A bag contains 4 red, 3 green, 2 yellow marbles. One marble is randomly chosen. What is the probability that the marble picked is red?
Answers are
A. 4/5
B.1/4
C. 1/3
D.4/9

Answers

Answer:

D

Step-by-step explanation:

total marbles

9

red marbles- 4

so prob is 4/9 or D

if my answer helps please mark as brainliest

Answer:

D

Step-by-step explanation:

4+3+2= 9

4 of the 9 are red and we can not simplify.

A book and a magazine cost 9.00. If a book costs 3$ more than a magazine , what is the cost of each

Answers

the book is $6 the magazine is $3

A rocket is launched from a tower. The height of the rocket, y in feet, is related to the
time after launch, x in seconds, by the given equation. Using this equation, find the
time that the rocket will hit the ground, to the nearest 100th of second.
y = -16x^2 + 232x + 134

Answers

Answer:

15.06 seconds.

Step-by-step explanation:

Hit Ground→Height=0

−16x^2  +232x + 134=0

a bacteria culture doubles every 3 minutes. if 400 bacteria started, how long will it take before there are 2000 in the culture?

Answers

Answer:

15 minutes

Step-by-step explanation:

400 to 2000(x5)

so, 3 times 5 is equal to 15 min

15 minutes to get to 2000

Which graph represents the function f(x) = 4|x|?

Answers

Answer:

The 2nd one

Step-by-step explanation:

It is a compression, because you are multiplying by a whole number greater than 1, therefor the line will look thinner

Sweet Orange
$1.29/lb
What's the final price of 8 pounds of oranges? Assume that the tax is regular and that your
membership gives you an extra 10% off. *

Answers

1.29x8=10.32
10.32x10%
10.32x0.10=1.03
10.32-1.03=9.29

Ira bought a t-shirt that was discounted 50%. He used a coupon for 50% off at the cash register. Why was he charged $6.50 instead of $0?

Answers

50% off makes the new price half of the original, then another 50 % would be half off the discounted price, so they actually end up paying 25 % of the original price:

50 % x 50 % = 25 %

Answer:

she was charged for 50% of the 50% off

Step-by-step explanation:

Lets say the original price was 100$ The store discounted it by 50% so it is now 50$ but the coupon take 50% off of that 50 so it would be 25$

Elijah invested $280 in an account paying an interest rate of 2.1% compounded
continuously. Assuming no deposits or withdrawals are made, how long would it
take, to the nearest tenth of a year, for the value of the account to reach $360?

Answers

Answer: 12

Step-by-step explanation:

Can you explain to me how to solve this?

Answers

Where’s the question

Explain the differences between properties of equality
and properties of inequality when solving equations and
inequalities.

Answers

Step-by-step explanation:

step 1. properties of equality have an "=" in the equation.

step 2. properties of inequality have a <, <=, >=, or a >.

Find the quotient: 68/6

Answers

Answer:

The answer is 11. 2 is the remainder

Step-by-step explanation:

hope this helps

can anyone give me the formula to this or how to solve it? thanks

Answers

I got 3

Multiply L x h and get 86.25

Divid that number by 258 and 3/4

BOOM

The width is 3.

A rectangular prism is 3d. This means that there are three dimensions being multiplied by each other to obtain the overall volume. We can use the equation V = lwh to solve this equation, with V being volume, and the following, length, width, height. Substituting in the values (and changing the mixed numbers to improper fractions for simplicity):

1035/4 = (15/2)(23/2)(w)

w = (1035/4)(2/15)(2/23)

w = 3

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