The height of a javelin in feet is modeled by h(t) = -16t2 + 79 +5, where t is time in seconds after the javelin is thrown. How long is it in the air? What is the maximum height? When does
the javelin reach a height of 99 feet?

a. she will receive a refund of $278.

step-by-step explanation:

m∠abd = m∠dbc

step-by-step explanation:

given : ab bisects ∠dbc

as we know that bisection means ab divides   ∠dbc   in two equal angles named as   ∠dba and   ∠abc

so, m∠abd = m∠dbc  

because ab bisects ∠dbc.

hence , the first statement m∠abd = m∠dbc is true.