Find the area of a regular octagon with a radius of 20

I really need to know the question: what percent of 84 is 12?

Maria bought seven boxes. A week later all her boxes were destroyed in a fire. There are now only 22 boxes left. With how many did she start with

Ax + 3x = bx + 5 solve for x =

What do you get when you round 4,610,047 to the nearest ten thousand

Which number is a multiple of 6? A 65 B 70 C 79 D 96 How do I find out?

A rectangular field has a length of 11m and width of 15m. lengths are measured to the nearest metre. what is the least possible area of the field? i just want to check whether my answer is right. an explanation would be appreciated.

A circle with area 25 pi has a sector with a central angle of 9/10 pi radians what is the area of the sector

How do you put 20/80 in simplest form

What is the equation of the line that goes through (3,4) and (9,-2) ? Use slope-intercept form.

The weight of a body varies inversely as the square of its distance from the center of the earth. If the radius of the earth is 3500 miles, how much would a 180-pound man weigh 750 miles above the surface of the earth?