I don’t know how to do this question please can someone help me, thank you

An objects motion is described by the equation d= 4sin (pi t) what will the height of the object be at 1.75 seconds?

What could explain what happened when the time was equal to 120 minutes

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15