EM→ bisects ∠DEF and m∠DEF = 83.6°. Find m∠DEM and m∠MEF.

Select a graph that have an equation with a < 0

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

The revenue each season from tickets at the theme park is represented by t(c)=5x. the cost to pay the employees each season is represented by r(x)=(1.5)^x. examine the graph of the combined function for total profit and estimate the profit after four seasons