Really need with this question ! the quadratic relation h=-5t^2+80t models the height, h in meters, that an object projected upward from the ground will reach in t seconds following its launch . what is the maximum height that this object will reach?

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

Asales representative from a local radio station is trying to convince the owner of a small fitness club to advertise on her station. the representative says that if the owner begins advertising on the station today, the club's total number of members will grow exponentially each month. she uses the given expression to model the number of club members, in hundreds, after advertising for t months.

Of the 304 people who attended a school play, 5/8 were students. how many of the people who attended were students.