Briefly explain why the graphs of the sine and cosine functions have wave shapes, and how can you change those waves? (1 - 2 sentences) *

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?

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

Aculture started with 3000 bacteria. after 5 hours it grew to 3900 bacteria. predict how many bacteria will be present after 9 hours