Answer:1/3
Step-by-step explanation: pierre has sent 4/12 of the packages which is equal to 1/3
The function is

.
We recall that the derivative of each monomial

is

, and the derivative of a constant (function) is 0.
According to this:

.
Answer:
Answer:
After 7.5 seconds and a height of 0
Step-by-step explanation:
Answer:
D
If you plug in the corresponding numbers to where they should go, that is the only equation that fits.
Answer:
a=21.1
Step-by-step explanation:
You can use the given (incorrect) equation and fill in the value of t to find h:
h = 12.5 +9sin(750(3.5)) = 3.68 . . . . feet
__
Or, you can use the correct equation, or just your knowledge of revolutions:
h = 12.5 +9sin(750(2π·3.5)) = 12.5 . . . . feet
in 3.5 minutes at 750 revolutions per minute, the propeller makes 2625 full revolutions, so is back where it started — at 12.5 feet above the ground.