# A cylinder has a radius of 12m and a height of 8m. What is the approximate surface area of the cylinder? use 3.14 for Pi.

Answer: Surface Area = 2 × π × r × (r+h). So  2 × π × 12 × (12+8). Then 2 × π × 12 × 20. And then 480 π. And your answer is about 1507.

## Related Questions

4(x-7)> -26+4x how do I do it and what's the answer

No solutions

Step-by-step explanation:

Open parenthesis:

4x-28>-26+4x

Move all like terms to one side:

-28-26>4x-4x

-54>0

-54 isn't greater than 0, so that means that there are no solutions.

:)

To add a fraction, you add the numerator(topnumber) to the other numerator. You also add the denominator(bottomnumber) to the other denominator. If the denominators are not alike, youhave to find the LCD and change the fractions, so that they are alike.For example:
1/2 +3/4
The denominators are unalike. So you have tofind the LCD (Least Common Denominator). The LCD is 4. Since 3/4already has 4 as the denominator, you only have to change 1/2. Youchange the 2 to 4, so it will look like this: 1/4. You still aren'tdone. You need to change the numerator. Since you multiply 2 by 2 to getfour, you need to multiply 1 by 2. Now you have:
5/4
Since this is an improper fraction, you have to simplify it. You divide the numerator by the denominator:
5 divided by 4 is 1 with 1 left over. You turn it into a fraction. So your answer is 1 1/4.

For decimals, you align the numbers then add.
1.34 + 56.2

1.34    See how I aligned the decimal points?
+56.2      That is how you align decimals. Now you just add.
------------
57.54

What is 108÷6 using distributive property.

Its simple just divide 108 and 6 which equals 18

A bread recipe calls for 3/4 cups of flour and 1/5 cup of sugar. based on the recipe, what is the amount of sugar that should be used with 1 cup of flour?A. 3/20 CUP
B. 4/15 CUP
C. 3 3/4 CUPS
D. 6 2/3 CUPS

The solution is, 4/15 is the amount of sugar that should be used with 1 cup of flour.

### What is  multiplication?

In mathematics, multiplication is a method of finding the product of two or more numbers. It is one of the basic arithmetic operations, that we use in everyday life.

here, we have,

Given

A bread recipe requires 3/4 cup of flour

and 1/5 cup of sugar

i.e. ratio of flour and sugar is 3/4 / 1/5

which will remain same for each time we make bread

When 1 cup of flour is used then amount of sugar is

Suppose x cup of sugar is required so equating the ratio of flour to sugar

to get one cup we can multiply by the reciprocal. (the oppisite of the current fraction) 3/4*4/3 = 1.

so then we need to raise the sugar by the same variable

1/5 * 4/3. cross multiplication gives us

1*4=4

3*5=15

x = 4/15

Hence, The solution is, 4/15 is the amount of sugar that should be used with 1 cup of flour.

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to get one cup we can multiply by the reciprocal. (the oppisite of the current fraction) 3/4*4/3 = 1. so then we need to raise the sugar by the same variable
1/5 * 4/3. cross multiplication gives us
1*4=4
3*5=15
4/15

How much is 300 pennies

It would be five dollars

\$3.00

Step-by-step explanation:

100 pennies in a dollar

so 300 pennies in \$3

See attached diagram.

In the first example:
Ratio of sides is 2/1
Ratio of perimeters is 2/1
Ratio of areas is 4/1

In the second example:
Ratio of sides is 3/1
Ratio of perimeters is 3/1
Ratio of areas is 9/1

We can derive these formulas:
Ratio of sides is a/b
Ratio of perimeters is a/b
Ratio of areas is (a/b)²

For #7, just draw the first example's diagram.
You may not need to label all the sides, though.