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Dvinal [7]
3 years ago
15

I need help with these two problems !!

Mathematics
1 answer:
wolverine [178]3 years ago
4 0

Not so sure about the second one, but the first one is pretty simple:

The area of a circle = pi x radius^2

Since you need to find the area of the entire dvd, I'm assuming they mean if the hole in the center wasn't there, so add that to the diameter.

12+1.5 = 13.5

Half of the diameter is the radius, so half of 13.5 = 6.75

Now, multiply pi (3.14) by the radius, but have the radius squared. You'd write the equation like this:

3.14 x 6.75^2 (or on paper, the ^2 would be a small two diagonal from the 5)

Actual answer: 143.06625

You can round that to 143.

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Lena [83]

Answer:

Each guest would get 6 party favors.

Step-by-step explanation:

First, we find out how many party favors Amy bought. 3 bags of 12 party favors equals 36 party favors (3x12)

So, divide 36 party favors by 6 guests, and you get the final answer of 6 party favors per guest.

Hope this helps!!

6 0
2 years ago
What is a variable? HELP HELP
bonufazy [111]

♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫

➷ A variable is an unknown number that is represented by a letter, for example, x.

It is usually found in an algebraic expression.

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➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

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5 0
3 years ago
Using your answer from #3, how many hours will
Sphinxa [80]

Answer:

5 hours cuz 75 divided by 15 is 5 or 15 x 5 is 75

3 0
2 years ago
Read 2 more answers
Please can someone help?
Alina [70]

Step-by-step explanation:

R = 6.5cm and r = 2.3 cm

area of the shaded region = area of the outer circle - area of the inner circle

= πR²-πr²

=π(R²-r²)

=π{(6.5)²-(2.3)²}

=π (42.25-5.29)

= 3.14× 36.96

= 115.866

= 116 cm²

6 0
3 years ago
What percent of 4,900 is 343?
timofeeve [1]

14.2857142857 is th e answer

5 0
3 years ago
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