Help The number of people who purchase a new video game on a given day can be modeled by the function f(t) = 55,000 (2/5)t
represents the number of days since the game's release days since the release date. Which of the following statements is true?

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)

Write the percent as a fraction or mixed number in simplest form. 0.8%