Answer:
He needs 31.25 bales of hay to feed 15 horses for two weeks
Step-by-step explanation:
This question can be solved using a rule of three.
25 bales of hay feed 12 horses. How many feed 15 horses?
12 horses - 25 bales of hay
15 horses - x bales of hay
He needs 31.25 bales of hay to feed 15 horses for two weeks
Given :
The percent of concentration of a certain drug in the bloodstream x hours after the drug is administered is given by .
To Find :
Find the time at which the concentration is a maximum. b. Find the maximum concentration.
Solution :
For maximum value of x, K'(x) = 0.
Since, time cannot be negative, so ignoring x = -3 .
Putting value of x = 3, we get, K(3) = 15/( 9 + 9) = 5/6
Therefore, maximum value drug in bloodstream is 5/6 at time x = 3 units.
Hence, this is the required solution.