A company makes big beach balls with a radius of 1 foot. The plastic to make the costs the company $.04 per square foot. To the nearest cent, how much does the company pay for the plastic to create one ball? Use 3.14 for π.

Imogene invested $8,000 in a bank account that pays 8 percent simple interest at the end of each year. her friend invested the same amount in stocks where the growth of the investment is represented as 2,000 times the square root of 2 less than the time lapsed in years. if y1 and y2 represent the amount earned in dollars and t is the time lapsed in years, which system of equations correctly represents the situation?

What is the range for 31,39,29,34,37,24,36,33,34,28

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a