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3 years ago

PLEASE PLEASE PLEASE HELP. :(

Mathematics

1 answer:

mart [117]3 years ago

7 0

Integers are like -4,-3,-2,-1,0,1,2,3,4 etc

√49=7, integer

-3⁰=-(3⁰)=-(1)=-1, integer

1.2 times 10⁻²=1.2/100=0.012, not an integer

18/3=6, integer

answer is 3rd one

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Natalija [7]

Answer:

240 cm^3

Step-by-step explanation:

Volume of a rectangular prism = base area x height

the base is a rectangle, thus base area = width x length = 4 x 5 = 20 cm^2

20cm^2 x 12 = 240 cm^3

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3 years ago

A set of exam scores is normally distributed and has a mean of 80.2 and a standard deviation of 11. What is the probability that

ZanzabumX [31]

Answer:

93.32% probability that a randomly selected score will be greater than 63.7.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

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 problem, we have that:

$\mu = 80.2, \sigma = 11$

What is the probability that a randomly selected score will be greater than 63.7.

This is 1 subtracted by the pvalue of Z when X = 63.7. So

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

$Z = \frac{63.7 - 80.2}{11}$

$Z = -1.5$

$Z = -1.5$ has a pvalue of 0.0668

1 - 0.0668 = 0.9332

93.32% probability that a randomly selected score will be greater than 63.7.

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3 years ago

Gary wants to buy a video game with a selling price of $48, on sale for 50% off. The sales tax in his state is 4.5%. How much wi

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Answer:

$25.20

Step-by-step explanation:

First, take the 50% off the sales price:

($48)*(-0.50) = -$24.

($48 - $24) = $24 sale price.

Tax on $24 is ($24)*(0.05) = $1.20

Add the price and sales tax:

$24 + $1.20 = $25.20

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2 years ago

Help me solve this please.

poizon [28]

6, 7, 8, and 9. just plug the X into the equation

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3 years ago

What is the general form to find square roots

Effectus [21]

Answer:

see below (I hope this helps!)

Step-by-step explanation:

Square roots are usually in the form a√b where a and b are any rational number.

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3 years ago