Find out how long it takes a $3100 investment to double if it is invested at 7% compounded quarterly, Round to the nearest tenth of a year. Use the formula A =
A) 10.2 years
B) 10.4 years
C) 10 years
D) 9.8 years

The rumpart family is building a new room onto their house. the width of the new room will be 16 feet. the length of the room will be 4% greater than the width. write an expression to find the length of the new room. what will be the area of this new room?

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

Segment an is an altitude of right δabc with a right angle at a. if ab = 2, squared 5 in and nc = 1 in, find bn, an, ac.