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2 years ago

PLEASE HELP!!!

Mathematics

1 answer:

Brilliant_brown [7]2 years ago

8 0

Answer: Is in the screenshot

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An exam consists of 10 true-or-false questions. If a student guesses at every answer, what is the probability that he or she wil

zysi [14]

This can be solved by using the binomial distribution. The probability of guessing correctly is 0.5, and the probability of making a wrong guess is also 0.5.
$P(6\ correct)=10C6\times(\frac{1}{2})^{6}\times(\frac{1}{2})^{4}=\frac{210}{1024}=0.205$

5 0

3 years ago

Did I get this right? Please explain how I got it right if I did

viva [34]

Answer:

no 6 hours

Step-by-step explanation:

no it would be 6 hours

25% = 7.5 hours

5% = 1.5 hours

7.5 - 1.5 = 6 hours

5 0

3 years ago

A tour bus travels 2,160 miles in 36 hours. What is the average distance th e bus travels in one hour.

nordsb [41]

2,160 / 36
= 60

Therefore, the average distance that the bus travels in one hour is 60 miles

6 0

4 years ago

The geography of New England made success of

creativ13 [48]

Hills, mountains and rivers.

3 0

3 years ago

Gardener has 780 plants. He wants to plant there in such a way that the number of rows and the numbers of columns remains same.

AleksAgata [21]

Answer:

<em>Gardener will need 4 more plants.</em>

Step-by-step explanation:

Gardener has 780 plants and wants to plant them in an array of n rows and n columns.

The number of plants needed to do that is:

$n*n=n^2$

He actually has 780 plants, thus it should occur:

$n^2=780$

Taking the square root:

n=27.9

Since n needs to be an integer, we round up n to get

n=28

But $28^2=784$ , 4 more than the actual number of plants, thus:

Gardener will need 4 more plants.

Note: There are other possible results for n. If we set n=29, then $n^2=841$ and Gardener would need 841-780=61 more plants, but the question asked for the minimum number of plants.

5 0

3 years ago