What is the exact area of a circle with a diameter of 18 feet

Answers

Answer 1

Answer: the exact answer is in the file below

Answer 2

Answer: Use the formula A= 3.14 (pi)r²
*R is radius*

A=3.14(9)²

A=3.14(81)

A= 256.34

Hoped this helped.

~Bob Ross®

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Help with question 9 please

Answers

Volume of a prism = Bh

B = area of the base
h = height

B = 1/2 (base1 + base2) x height
B = 1/2 (9+6) x 8
B = 1/2 (15) x 8
B = 4 x 15
B = 60

Volume = 720
720 = B x h
720 = 60 x h
h = 12

So the height or length is 12mm.

Surface Area = 2B + 2P

Where
B is the area of the base
P is the perimeter of the base

We already know that B= 60

P = 9 + 10 + 6 + 8
P = 33

So

SA = 2*60 + 2*33
SA = 120 + 66
SA = 186

The surface area is equal to 186mm^2.

Fill in the blacks please! Due in 15 mins!

Answers

Answer:

The numbers in bold are the blanks.

Step-by-step explanation:

7/5 + 3/8 = 56/40 + 15/40 = 71/40

Answer:

1 31/40 or

71/40

Step-by-step explanation:

7/5+3/8=56/40+15/40=71/40=1 31/40

If you're solving a quadratic equation by factoringwhat would the factorization of f(x)=2x^2+15x+7

Answers

Answer:

(2x+1)(x+7)

Step-by-step explanation:

What are the solutions to the quadratic equation 3(x − 4)^2 = 75?a- x = −9 and x = 1
b- x = −5 and x = 5
c- x = −4 and x = 4
d- x = −1 and x = 9

Answers

the answer is (d) where x = -1 & 9

What additional information would you need to prove that ΔABC ≅ ΔDEF by SSS? 1.AC=DF
2.AC=FD
3.AF=CD
4.FA=CD

Answers

For the answer to the question above asking What additional information would you need to prove that ΔABC ≅ ΔDEF by SSS?
The answer to your question is AB = DE & BC = EF, so the only sides missing are AC = DF,

so Side AC is congruent to side DF is the answer.

I hope my answer helped you. Have a nice day!

Answer: AC=DF

Step-by-step explanation:

Took the test!

I don’t know this one

Answers

Answer:

3077.2

Step-by-step explanation:

A circle's mass is found by

Pie times R^2

7^2 is 49, times 3.14 is 153.86

then you Multiply 153.86 by 20 which gives you 3077.2

Volume of a cylinder = pi r^2 * h
Pi 7^2 * 20
Volume = 49 pi

Density = mass/ volume
2.5= mass/ 49 pi
Mass= density * volume
= 2.5*49 pi
= 245/2 pi
= 384.845...
=384.8 g to 1 dp

Answer= Volume

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