WILL GIVE BRAINLIEST NEED HELP

Volume of cylinder with a radius of 8cm and height of 25 cm

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?

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?