Find the radius of a circle with an area of 615.75 square kilometers

14 km

Step-by-step explanation:

To find out the radius of a circle we can use the formula of

A=pi r^2

Our area is 615.75 square kilometers:

615.75=pi r^2

divide by pi on both sides

615.75/pi = r^2

take square root of both sides

r=sqrt615.75/pi

r=13.999975

Assuming it will be rounded to two decimal places the radius would be r=14.00 km

hello from mrbilldoesmath!

answer:   x (x+6)^2, choice b

discussion:

factor x out of the equation:

x^3 + 12x^2 + 36x = x (x^2 + 12x + 36).

note that 6+6 = 12 and 6*6 = 36 so the above factors into:

x (x+6)^2

which is choice b

you,

mrb

change of stock price/initial stock price on friday * total stock value = change of stock value

0.89/73.73 *x = 42.72

x=3539.04 = total stock value at initial stock price on friday .

total stock value at initial stock price on friday/ initial stock price on friday = number of shares

3539.04/73.73 = 48 shares

they own 48 shares of this stock