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3 years ago

What is the perimeter of a if it has an area of 81 centimetre squares?

Mathematics

1 answer:

katrin2010 [14]3 years ago

4 0

We can't tell without knowing its shape. Also, if it's a rectangle, we need to know one of its dimensions.

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C. What number is 40% of 1607?

Novay_Z [31]

Answer:

642.8

Step-by-step explanation:

1607 divided by 10 = 160.7 x 4 = 642.8

8 0

3 years ago

The radius of a circle is 4 feet. What is the length of a 90° arc? HELP ME PLEASE

Elza [17]

Answer:

6.3feet

Step-by-step explanation:

Given data

Radius= 4feet

The expression for the circumference of a circle is

C= 2πr

Substitute

C=2*3.142*4

C=25.136 feet

Also, a 90° arc is 1/4 of the circumference of a circle

Hence the length of the 90° arc is

=25.136/4

=6.284 feet

=6.3feet

4 0

3 years ago

What is the mass of 75¢ in nickels?

Dima020 [189]

According to the United States Mint, the mass of 1 nickel is 5.000 g.

$\dfrac{\$0.75}{\$0.05} = 15$

There are 15 nickles in 75 cents worth of nickels.

15 * 5.000 g = 75.000 g

Answer: 75.000 grams

6 0

3 years ago

If figure 1 has 7 tiles and figure 2 has 9 tiles figure 3 has 11 tiles what Is the rule

DIA [1.3K]

Answer:

it is 3

Step-by-step explanation:

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5 0

3 years ago

Read 2 more answers

Which of the following could be the side measures of a right triangle ? GIVING BRAINLIEST

Tresset [83]

Answer:

Step-by-step explanation:

A^2 + B^2 = C^2 - Right Triangle Formula

8^2 + 7^2 = 6^2 - Plug it into the formula

64 + 49 = 36 - Solve

64 = 85 - Add B and C

21 - your answer

Hopefully this helps.

5 0

3 years ago