Identify the correct inverse trigonometric function to use to stop giving angle

Cynthia takes her dog to the park every 2 days. she bathes her dog every 7 days. if she took her dog to the park and bathed him today, how long will it be until she does both on the same day again?

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

Will give brainliest immeadeately true or false: the origin woud be included in the solution set for the inequality: y< 2x-5