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BartSMP [9]
3 years ago
10

Can someone help me...

Mathematics
1 answer:
lukranit [14]3 years ago
4 0

Answer:

48.3 cm^2

Step-by-step explanation:

The area of the enclosing square is that of a square 15 cm on a side, so is ...

square area = (15 cm)^2 = 225 cm^2

The white area is that of a quarter-circle of radius 15 cm, so that area is ...

quarter-circle area = (1/4)πr^2 = (π/4)·(15 cm)^2 = 56.25π cm^2 ≈ 176.7 cm^2

Then the yellow area is the difference ...

yellow area = square area - quarter-circle area

= (225 cm^2) - (176.7 cm^2)

yellow area = 48.3 cm^2

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I am a 3 digit number that has a 2 in the hundreds place. I am divisible by 3,4, and 5. What number am I?
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4 0
3 years ago
Easy math!!! Do #13 and #14 (#15 optional)<br> Please show work!
Andru [333]
13. Let A = the amount of money in the given time, P = principal amount; the amount of money you start with, T = time in years, R = interest rate, and N = amount of times interest is compounded each year.

The formula for compound interest is:

A = P(1 +  \frac{R}{N} )^{NT}

Now, we find in the information from the description needed to plug in. P = $1000, R = 7% or 0.07, N = 1 time a year, T = 3 years

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This simplifies to:

A = 1000(1 + 0.07)^{3}

And again to:

A = 1000(1.07)^{3}

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14. (x² + 3)(x - 3)(x + 3)

I'm going to do FOIL method on the second and third binomials first and simplify. This gives you:

(x² + 3)(x² - 9)

Then you do the FOIL method again to get:

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And combine like terms for your answer:

x⁴ - 6x² - 27

Number 15 doesn't give you a number to set the polynomial (that results from multiplying those two binomials) equal to so I'm guessing it wants you to set said polynomial equal to zero and solve for x then plug back in. 

If not, your area is found by the equation 3x² - 5x - 12
4 0
3 years ago
On a class trip to the zoo, there is 1 chaperone for every 4 students. If 5 chaperones are on the trip, how many students are go
aleksandr82 [10.1K]

Answer:

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Step-by-step explanation:

If there is 1 chaperone for every 4 students, and there are a total of 5 chaperones on the trip, you can use this information to know that..

If there are 5 chaperones and 4 students for each chaperone, that would give you 20 students!

6 0
2 years ago
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