Can you pleassesesesseseesese help me

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

Read the situations in the table below. then drag a graph and equation to represent each situation. indicate whether each of the relationships is proportional or non-proportional. edit : i got the right answer its attached

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?