Can someone me with the first question? i can't seem to get pass this one. : )

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

The reflexive property of congruence lets you say that ∠pqr ≅

Aprojectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = -16t2 + 704t. after how many seconds does the projectile take to reach its maximum height?