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3 years ago

7

Susan designed a circular pool with diameter of 25 meters. What is the area of the bottom of the pool?

2 answers:

wel3 years ago

7 0

Answer: Area = 490.87 meters

Step-by-step explanation:

A=πr2

r = 12.5 (1/2 of diameter)

A = 490.87 meters

hjlf3 years ago

4 0

Step-by-step explanation:

We know that the formula to find the area of a circle is πr^2 or in other words, pi times the radius squared. We have been given the diamter of 25 inches. We know that the diamater is double the radius. 25 divided by 2 will get us 12.5. If we write this in equation form (or substitute the variables) will be written as: (3.14)12.5^2, 3.14 being pi. Now, we would multiply the radius by radius (because it's squared) or in other words, (12.5*12.5) to equal 156.25. If we write this in equation form, we would get: 3.14(156.25). Now we finally multiply pi (3.14) times 156.25 to equal 490.625 or rounded to the tenth 490.6

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1000 was invested at 5.5% interest, compounded annually. After sometime the amount had grown to 1550. How long was the money inv

scZoUnD [109]

compound interest equation for annually compounded

$A=P(1+r)^t$

A=final amount

P=principal

r=rate in decimal

t=time in years

given that

A=1550

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find t

$1550=1000(1+0.055)^t$

divide both sides by 1000

$1.55=1.055^t$

take ln of both sides

$ln(1.55)=ln(1.055^t)$

use ln rule $ln(a^b)=b(ln(a))$

$ln(1.55)=t(ln(1.055))$

divide both sides by ln(1.055)

$\frac{ln(1.55)}{ln(1.055)}=t$

using a calculator, we get that t=8.18544 yrs

so about 8.2yrs

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wlad13 [49]

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JulsSmile [24]

Answer:

C

Step-by-step explanation:

The equation of a line in slope- intercept form is

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y = - 4x + 9 ← is in slope- intercept form

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Iteru [2.4K]

Answer:

Step-by-step explanation:

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