Answer this for points

2+2=

The quadratic function h(t)=-16.1t^2+150 choose the graph representation

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

The power generated by an electrical circuit (in watts) as a function of its current c (in amperes) is modeled by p(c)= -15c(c-8) what current will produce the maximum power?