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NeX [460]
2 years ago
8

The student council is planning for the prom. They have broken down their expenses in the graph below. If they decide they will

spend $1,200 on refreshments, then what is their total budget?
Prom Budget:
Entertainment: 25%
Refreshments: 30%
Decorations: 45%
Answer choices:
A. $3,600
B. $6,000
C. $7,200
D. $4,000
(Please help me!)
Mathematics
1 answer:
Hoochie [10]2 years ago
6 0

Answer:

D

Step-by-step explanation:

1200=30%

1200/x=30%

1200*.3=400

400=x

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At a pet store the ratio of cats to dogs sold was 10:1. If there were 60 cast that were sold, how many dogs were sold?
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Ratio for this mean for every 10 cats sold there was one dog


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3 years ago
What is the result of subtracting the second equation from the first?<br> -4x-2y=-2<br> x-2y=9
TEA [102]

Answer:

x = 11/5 or 2 1/5

Step-by-step explanation:

propagate the negative through the bottom equation

-5x = -11

x = 11/5

3 0
3 years ago
Ronald invested $68160 for 8 years and earned 6.2% interest compounded annually
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Answer:

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6 0
3 years ago
Consider a paint-drying situation in which drying time for a test specimen is normally distributed with σ = 7. The hypotheses H0
pshichka [43]

Answer:

(a) The value \bar x = 72.3 is 1.21 standard deviations below the null value of <em>μ</em>.

(b) The mean drying time of paint is not less than 74.

Step-by-step explanation:

The hypothesis for the single mean test is:

<em>H₀</em>: <em>μ</em> = 74 vs. <em>Hₐ</em>: μ < 74.

The information provided is:

<em>σ</em> = 7

<em>n</em> = 25

As the population standard deviation is known, we will use a <em>z</em>-test for single mean.

(a)

The <em>z</em>-score is a Normal distribution with mean 0 and variance 1. It is also defined as the number of standard deviations a raw score is from the mean.

The <em>z</em>-score for sample mean is given by:

z=\frac{\bar x-\mu}{\sigma/\sqrt{n}}

If \bar x = 72.3 compute the corresponding <em>z</em>-score as follows:

z=\frac{\bar x-\mu}{\sigma/\sqrt{n}}

  =\frac{72.3-74}{7/\sqrt{25}}\\=-1.21

Thus, the value \bar x = 72.3 is 1.21 standard deviations below the null value of <em>μ</em>.

(b)

So the test statistic is, <em>z</em> = -1.21.

Compute the <em>p</em>-value of the test as follows:

p-value=P(Z

*Use a <em>z</em>-table.

The decision rule says to, reject the null hypothesis if the <em>p</em>-value is less than the significance level <em>α</em> = 0.01 and vice-versa.

<em>p</em>-value = 0.1131 < <em>α</em> = 0.01

The null hypothesis was failed to be rejected.

Thus, the mean drying time of paint is not less than 74.

6 0
2 years ago
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