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Ber [7]
3 years ago
13

Mrs. Beasley is asking students to find the volume of the cylinder below using 3.14 for pi. Which student wrote the correct expr

ession for the value of B, the area of the base
Mathematics
2 answers:
satela [25.4K]3 years ago
4 0

Answer:

A=3.14\times r^{2}

Step-by-step explanation:

The volume of a cylinder is given as the product of surface area and height.

V=Ah

But the surface area is given by

A=\pi r^{2}

Taking value of \pi as 3.14 then the surface area is

A=3.14\times r^{2}

Therefore, the volume being V=Ah hence

V=3.14\times r^{2}\times h

This question only wants us to establish the surface area hence

A=3.14\times r^{2}

cupoosta [38]3 years ago
4 0

Answer

Brittany (3.14)(4)

Step-by-step explanation:

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6k+4k<-4k+6 solve for k
Genrish500 [490]

Answer:

k < 3/7

Step-by-step explanation:

Step 1:Sinplify both sides of the inequality

10k <-4k+6

Step 2: Add 4k to both sides

10k + 4k < -4k + 6 + 4k

14k < 6

Step 3:Divide both sides by 14

14k/14 < 6/14

k <3/7

Note:Provided by Mathpapa an Algebra caculator

6 0
2 years ago
Typing errors in a text are either nonword errors (as when "the" is typed as "teh") or word errors that result in a real but inc
nordsb [41]

Answer:

a) X is binomial with n = 10 and p = 0.3

Y is binomial with n = 10 and p = 0.7

b) The mean number of errors caught is 7.

The mean number of errors missed is 3.

c) The standard deviation of the number of errors caught is 1.4491.

The standard deviation of the number of errors missed is 1.4491.

Step-by-step explanation:

For each typing error, there are only two possible outcomes. Either it is caught, or it is not. The probability of a typing error being caught is independent of other errors. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

The expected value of the binomial distribution is:

E(X) = np

The standard deviation of the binomial distribution is:

\sqrt{V(X)} = \sqrt{np(1-p)}

10 word errors.

This means that n = 10

(a) If X is the number of word errors missed, what is the distribution of X ?

Human proofreaders catch 70 % of word errors. This means that they miss 30% of errors.

So for X, p = 0.3.

The answer is:

X is binomial with n = 10 and p = 0.3.

If Y is the number of word errors caught, what is the distribution of Y ?

Human proofreaders catch 70 % of word errors.

So for Y, p = 0.7.

The answer is:

Y is binomial with n = 10 and p = 0.7

(b) What is the mean number of errors caught?

E(Y) = np = 10*0.7 = 7

The mean number of errors caught is 7.

What is the mean number of errors missed?

E(X) = np = 10*0.3 = 3

The mean number of errors missed is 3.

(c) What is the standard deviation of the number of errors caught?

\sqrt{V(Y)} = \sqrt{np(1-p)} = \sqrt{10*0.7*0.3} = 1.4491

The standard deviation of the number of errors caught is 1.4491.

What is the standard deviation of the number of errors missed?

\sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{10*0.3*0.7} = 1.4491

The standard deviation of the number of errors missed is 1.4491.

6 0
3 years ago
Which equation has the same solution
Temka [501]
4x^2+48x=20
4x^2+48x+144=164
(2x+12).(2x+12)= + 59rt(164)
                                -
8 0
3 years ago
2 divided by 9/10<br> (i know this is simple but I need help ASAP)
tigry1 [53]

Answer:

2.22

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
The area of South America is approximately 1.78 × 107 square kilometers. Its population is approximately 3.50 × 108 people. What
stepladder [879]

Answer:

<u>A) 19.66 people/km²</u>

Step-by-step explanation:

<u>Given</u>

  • Area of the continent = 1.78 x 10⁷ km²
  • Population = 3.5 x 10⁸ people

<u>To Find</u>

  • Population Density

<u>Solving</u>

  • population density is the number of people per unit area
  • pd = people / area
  • pd = 3.5 x 10⁸ / 1.78 x 10⁷
  • pd = 1.966 x 10
  • pd = <u>19.66 people/km²</u>
6 0
2 years ago
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