A radioactive substance decays exponentially. A scientist begins with 160 milligrams of a radioactive substance. After 26 hours, 80 mg of the substance remains. How many milligrams will remain after 43 hours?

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?

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0

This graph shows which inequality? a ≤ –3 a > –3 a ≥ –3 a < –3