Solve for t when 15cos(2pi/365t)43

Astuntman jumping off a 20-m-high building is modeled by the equation h=20-5t^2, where t is the same in seconds. a high-speed camera is ready to film him between 15m and 10m above the ground. for which interval of time should the camera film him?

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.