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3 years ago

Ok so these math questions are simple. Would you be able to do them?

Mathematics

1 answer:

alexandr402 [8]3 years ago

3 0

Answer:

3) it would be the first one 3*(6/5) and it would be the second one 3/(5*6)

Step-by-step explanation:

when you put it in the calculator they come out to be 3.6

I have no idea for the question above it

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.09 is 10 times as much as

Alekssandra [29.7K]

0.009 Im almost positive of it

3 0

3 years ago

A square pyramid of base 3cm by 3cm is made from 18cm3 of clay.

ss7ja [257]

Answer:

6 cms.

Step-by-step explanation:

Volume of the pyramid = 1/3 * area of base * height

= 1/3 * 3*3 * h = 18

1/3 * 9 * h = 18

3h = 18

h = 6 cm

7 0

3 years ago

Almost all medical schools require applicants to take the Medical College Admission Test (MCAT). To estimate the mean score of t

jenyasd209 [6]

Answer:

97.92% probability that the mean score of your sample is between 22 and 28

Step-by-step explanation:

To solve this question, we have to understand the normal probability distribution and the central limit theorem.

Normal probability distribution:

Problems of normally distributed samples can be 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.

Central limit theorem:

The Central Limit Theorem estabilishes that, for a random variable X, with mean $\mu$ and standard deviation $\sigma$ , a large sample size can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$

In this problem, we have that:

$\mu = 25, \sigma = 6.5, n = 25, s = \frac{6.5}{\sqrt{25}} = 1.3$

What is the probability that the mean score of your sample is between 22 and 28

This is the pvalue of Z when X = 28 subtracted by the pvalue of Z when X = 22. So

X = 28

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

By the Central Limit theorem

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

$Z = \frac{28 - 25}{1.3}$

$Z = 2.31$

$Z = 2.31$ has a pvalue of 0.9896

X = 22

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

$Z = \frac{22 - 25}{1.3}$

$Z = -2.31$

$Z = -2.31$ has a pvalue of 0.0104

0.9896 - 0.0104 = 0.9792

97.92% probability that the mean score of your sample is between 22 and 28

8 0

3 years ago

At your job, you make $8 per hour, and are promised to get a $0.03 per month. Your friend makes $8.15, and is promised a $0.02 r

Rudik [331]

Answer:

3883.2 dollars.

Step-by-step explanation:

We must analyze the situation of each one,

The first tells us to earn 8 dollars an hour, he is promised to receive 0.03 dollars per month, which means that he would already have that increase that month. Therefore, you would have 8.03 per hour of earnings.

The second, on the other hand, although he earns $ 8.15 per hour, the increase is promised every month, that is, it is NO month with the increase of 0.02.

Now assuming they work 8 hours a day and 30 days a month, it would be a total of 8 * 30 = 240 hours.

Now multiplying your hourly income, we will get what each person earns per month.

8.03 * 240 = 1927.2 dollars

8.15 * 240 = 1956 dollars

Which means that both will earn a total of:

1927.2 + 1956 = 3883.2 dollars.

4 0

3 years ago

thanh bought 11 pieces of fruit and spent $5.60. if apples cost $0.60 each and pairs cost $0.35 each. how many of each kind of f

son4ous [18]

Answer:

The number of apples bought was 7 and the number of pears bought was 4

Step-by-step explanation:

<u><em>The correct question is</em></u>

Thanh bought 11 pieces of fruit and spent $5.60. If apples cost $0.60 each and pears cost $0.35 each, how many of each kind of fruit did he buy?

Let

x ---->the number of apples bought

y ----> the number of pears bought

we know that

Thanh bought 11 pieces of fruit

$x+y=11$ ----> equation A

apples cost $0.60 each and pears cost $0.35 each and Thanh spent $5.60

$0.60x+0.35y=5.60$ ----> equation B

Solve the system of equations by graphing

Remember that the solution is the intersection point both graphs

Using a graphing tool

The solution is the point (7,4)

see the attached figure

therefore

The number of apples bought was 7 and the number of pears bought was 4

5 0

3 years ago

Ok so these math questions are simple. Would you be able to do them?​

Ok so these math questions are simple. Would you be able to do them?