Angela is jumping on a trampoline. Her height above the trampoline , in meters, is given by , at seconds after she started jumping.
How many seconds after each rebound does it take her to reach a height of 50 cm during the descent? Round your answer to the nearest tenth of a second.
What fraction of the time is Angela at least 1.2 m above the trampoline? Express your answer as a percentage correct to one decimal place.
The outside temperature (in degrees Celsius) on a certain day was modeled with , where is the time after midnight in hours. At what times of the day was the temperature ? Give your answer to the nearest minute using a 24-hour format.
The daily solar irradiation on a point just above Earth’s atmosphere days after the summer solstice is given by . How many times per year is the daily solar irradiation W/m2? How many days after the solstice does this occur?
The number of hours of daylight in Paris depends on the season, and it is modeled by , where is the number of the day in a year (January 1 is day 1). According to this model, when is the length of the day in Paris 10 hours?
Molly and her friends got on a Ferris wheel. When they entered the cabin at 3:15 pm, they were 5 m above the ground. The height of the cabin minutes after they got into it is given by . When were they 40 m above the ground? Give your answer to the nearest minute.