Approximately 9 out of 10 smokers began smoking before the age of 21. In a group of 400 smokers, about how many of them started before they reached their 21st birthday?

Dre' wants to add 1 foot of grass all around his doghouse for a dog run. If the doghouse is 2 feet by 5 feet, what would the area of the grassy region be

Jan is looking at a map of Roaring River. The map was created using the scale 1 inch: 25 miles. If the river is 5.5 inches long on the map, then it is actually miles long.

Solve for the x's. x (3.8) = 9 (4) - 9 (x)

Given an arithmetic sequence with a7=19 and a12=54 find a15 A. 61 B. 68 C. 75 D. 82

How do you turn two thirds into a decimal

How do u expand 500,000

How does the volume of a sphere with radius 2cm compare to the volume of a sphere with radius 1cm

6 yards to 36 yards. Find the percent of change. Round to the nearest tenth of a percent if necessary.

Mark, evan, and cayla are playing a game. there are 3 blue marbles, 2 red, and 1 green marble. if mark pulls a blue marble he gets $1. if evan pulls a red marble, he gets a $2. if cayla pulls a green marble, she gets $3.

How do you reduce 12/30 by 1/2