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2 years ago

How do we take tax back off

1 answer:

3 0

Tax is going to be the price that you see before checking out and getting your total. not sure if this is what you're asking but i hope it helps

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A radio station claims that the amount of advertising per hour of broadcast time has an average of 13 minutes and a standard dev

zimovet [89]

Answer:

$Z = 3.33$

Step-by-step explanation:

Z-score:

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question:

$\mu = 13, \sigma = 1.2$

You listen to the radio station for 1 hour, at a randomly selected time, and carefully observe that the amount of advertising time is equal to 17 minutes. Calculate the z-score for this amount of advertising time.

We have to find Z when X = 17. So

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{17 - 13}{1.2}$

$Z = 3.33$

5 0

2 years ago

A plant cell has length 6.6 times 10 Superscript negative 6 m and width 2.2 times 10 Superscript negative 6 m. What is the ratio

Vinvika [58]

The length/width ratio is 3/1 .

l = 6.6 × 10⁻⁶ m; w = 2.2 × 10⁻⁶ m

l/w = 6.6 × 10⁻⁶ m/2.2 × 10⁻⁶ m = 3/1

8 0

2 years ago

I need help with math homework last question please help me ASAP

Evgen [1.6K]

Answer:

yo need to do a grafic you need tu pud x and y en the grafic

6 0

2 years ago

Solve for x. -5(x – 4) = -30 Enter your answer in the box. x =

Svetlanka [38]

Answer:

$- 5(x - 4) = 30$

$- 5x + 20 = 30$

$- 5x = 30 - 20 = 10$

$x = 10 \div - 5$

$x = - 2$

3 0

2 years ago

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Tamika wants to double the volume of a square pyramid. What should she do?

ella [17]

To efficiently double the volume of a square pyramid, you need to double the height of the pyramid.

V = (1/3)Ah where A is the area of the base. If you double the height and leave A unchanged, the volume will also be doubled (replace h with 2h in the formula).

7 0

3 years ago

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