12. The function M(h) = 10e-0.173h can be used to find the number of milligrams M of morphine that is
in the patient's bloodstream h hours after the drug has been administered.
(a) What was the initial dosage?
(b) How many milligrams will be present after 1 hour? After 4 hours?

please help..

"curse these trig-loving pirates! " devora mutters as she looks at the map. then, after thinking for a moment, she walks back to the entrance of the secret cave, measuring 48 meters along the way. after performing a calculation, devora walks back to the empty treasure, faces the entrance, and turns a certain number of degrees to her left before walking 89 meters to the treasure. supposing that the angle at the cave entrance is acute and that devora's calculations were correct, how many degrees did she turn?