Given that lines a and b are parallel and that m<4=128, find m<7

The hypotenuse of a 45 -45 -90 triangle measure 7 square root 2 units

Apatient is given 50 mg dose of medicine the medicines effectiveness decreases every hour at a constant rate of 40% what is the exponential decay function that models this scenario how much medicine will be left in the patients system after 2 hours

1. what is the measure of ∠abc? what is the measure of ∠abd?