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3 years ago

NEED HELP!!!!!!!!!!!!!!!!!!!! anybody know???????????????????????????

Mathematics

1 answer:

aleksandrvk [35]3 years ago

7 0

Answer:

530.66.

Step-by-step explanation:

The area formula for a circle is $\pi r^{2} .$

We will use 3.14 for pi.

This is simple- we put the numbers in the formula.

$3.14 * 13^{2} = 530.66.$

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Options:<br> 14<br> 36<br> 16<br> 12

Lerok [7]

Answer:

12 million dollars.

Step-by-step explanation:

Let the sales in the first year be x million .

So the sales in the second year were x + 4 million, in the third year were 3(x + 4) and this is 48 million dollars.

So we have the equation 3(x + 4) = 48

3x + 12 = 48

3x = 36

x = 12 million dollars.

8 0

3 years ago

This figure represents a compartment in a container for storing office supplies. Another compartment is identical except that it

postnew [5]

Answer:

140cm³

Step-by-step explanation:

Credit: yaretzigutierrez50

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2 years ago

What are the new coordinates of (10,3) reflected along the x axis?

Anon25 [30]

Answer:

(10,-3)

Step-by-step explanation:

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3 years ago

A chemist wishes to mix a solution that is 6% acid. She has on hand 14 liters of a 4% acid solution and wishes to add some 10% a

jonny [76]

she should add 7 liters of 10% acid solution

Explanation

Step 1

set the equation:

a) let X represents the amount os solution that is 4% acid

let Y represents the amount os solution that is 10% acid

$\begin{gathered} \frac{4}{100}X+\frac{10}{100}Y=\frac{6}{100}(x+y) \\ \end{gathered}$

if he has 14 liters of 4% acid solution

$x=14$

$\begin{gathered} \frac{4}{100}X+\frac{10}{100}Y=\frac{6}{100}(X+Y) \\ \frac{4}{100}*14+\frac{10}{100}Y=\frac{6}{100}(X+Y) \\ 0.56+0.1Y=0.06(14+Y) \\ 0.56+0.1Y=0.84+0.06Y \\ \end{gathered}$

Step 2

solve the equation :

$\begin{gathered} 0.56+0.1Y=0.84+0.06Y \\ subtract\text{ 0.06Y in both sides} \\ 0.56+0.1Y-0.06Y=0.84+0.06Y-0.06Y \\ 0.56+0.04Y=0.84 \\ subtract\text{ 0.56 in both sides} \\ 0.56+0.04Y-0.56=0.84-0.56 \\ 0.04Y=0.28 \\ divide\text{ both sides by 0.04} \\ \frac{0.04Y}{0.04}=\frac{0.28}{0.04} \\ Y=7 \end{gathered}$

therefore,

she should add 7 liters of 10% acid solution

I hope this helps you

8 0

1 year ago

How many 4s are in 16 ?

kiruha [24]

Answer:

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers