The diagram shows the area of the circle being redrawn as a parallelogram with the length of it being half the circumference and the height of it being the radius of the circle.

The area of the parallelogram is the product of its length (C/2) and its height (r), so you can compute ...

A = (1/2)Cr

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Given only the circumference, C = 2πr, you can find the value of r by dividing by its coefficient:

C/(2π) = r

Using this in the above formula, the area can be found from the circumference only as ...

A = (1/2)C·(C/(2π))

A = C^2/(4π)

4 0

3 years ago

Pls, help me I am not good at math at all!

devlian [24]

Answer:

$9\frac{3}{4}$

Step-by-step explanation:

I used a special fraction Calculator, it's called calculator, but you have to download it

8 0

3 years ago

Find the time required for an investment of 5000 dollars to grow to 6400 dollars at an interest rate of 7.5 percent per year, co

Citrus2011 [14]

Answer:

t= 3.322 years

Step-by-step explanation:

investment made= $5000 (Principal)

amount obtained after a specific time= $6400

rate %= 7.5% per year compounded quarterly which means

r= 7.5/(100*4)= 0.01875

time = 4t ( compounded quarterly)

we know that Amount obtained is given by

$A= P(1+r)^{4t}$

$6400= 5000(1+0.01875)^{4t}$

$(1.01875)^{4t}=1.28$

taking log on both sides and solving we get

t= 3.322 years

hence my answer t= 3.322 years

8 0

4 years ago

În figura alăturată, este un pătrat cu = 12 cm, punctul este mijlocul lui (), ∩ = {}, iar

olya-2409 [2.1K]

Answer:

yes

Step-by-step explanation:

5 0

3 years ago