Help please thxs marking brainlest

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

Can any one me with the answers to these questions asap?

Jacob signs up to work for 2 1/2 hours at the school carnival. if each work shift is 3/4 hour, how many shifts will jacob work? (i just want to double check : |, for anybody that responds! : )