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LenKa [72]
3 years ago
14

How much more area does a large pizza with a 12 in. diameter have than a small pizza with an 8 in. diameter? Round your answer t

o the nearest square inch
38 in2

63 in2

87 in2

13 in2
Mathematics
2 answers:
uranmaximum [27]3 years ago
8 0
I'm pretty sure its 87 in2 but don't trust me! lol
Harlamova29_29 [7]3 years ago
8 0
A = pi × r^2 = pi × (d/2)^2
So A(large) - A(small) =
\pi {(12 \div 2)}^{2} - \pi {(8 \div 2)}^{2}   \\ = \pi {(6)}^{2} - \pi {(4)}^{2}  = 36\pi - 16\pi \\  = 20\pi \:  {in}^{2}  = 20 \times 3.1415 \:  {in}^{2}   \\  = 62.8 \:  {in}^{2}  = 63 \:  {in}^{2}
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Answer:

dont you already have it

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5 0
4 years ago
Johnny has $100 in the bank and plans to deposit $15 per day. Sal has $250
ICE Princess25 [194]

Answer:

6 days

Step-by-step explanation:

First we have to write an expression that represents Johnny's and Sal's banking plans.

Johnny: He has an initial value of $100 and that value will increase by $15 every day. So the expression looks like: 15x + 100, where x is the amount of days it's been.

Sal: An initial value of $250 and the value will decrease by $10 everyday. The expression looks like: -10x + 250, where x is the amount of days it's been.

To find how many days they have until they have the same amount of money in the bank, we can set the expressions equal to each other and solve for x:

15x + 100 = -10x + 250

Add 10x to both sides to isolate the x on one side of the equation:

25x + 100 = 250

Subtract 100 from both sides of the equation to isolate 25x:

25x = 150

Divide both sides by 25 to find the value of x:

x = 6

Since x represents the amount of days it's been, x = 6 means that it will take 6 days for their bank accounts to have the same amount of money in them.

Hope this helps :)

7 0
3 years ago
Rob spent 25\%25% more time on his research project than he had planned. He spent an extra hh hours on the project.
MatroZZZ [7]

Answer: 5h represents the number of hours Rob actually spent on the project.


Step-by-step explanation:

Let Rob planned that he will spend x hours in his project.

According to the question,

He spent 25% more time on his project than he planned.

That is,  his actual time = x + 25% of x = 125% of x

Again according to the question,

He spent an extra h hours on his project.

That is,  25% of x = h

\frac{25\times x}{100} = h

x=\frac{100h}{25}

x = 4h

Thus,  his actual time = 125% of x = 125% of 4h = \frac{125\times 4h}{100} = 5h

Which is the required expression.


4 0
4 years ago
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It should be $5.68 if not mistaken
4 0
3 years ago
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