please help me my last question on my math test please help me its due on 10:10am please help me please i really need help please

Suppose a pendulum is l meters long. the time,t,in seconds that it tales to swing back and forth once is given by t=2.01

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?