A truck can be rented from Company A for $120 a day plus $0.60 per mile. Company B charges $60 a day plus $0.90 per mile to rent
the same truck. Find the number of miles in a day at which the rental costs for Company A and Company B are the same.
1 answer:
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You're correct, the answer is C.
Given any function of the form
, then the derivative of y with respect to x (
) is written as:
In which
is any constant, this is called the power rule for differentiation.
For this example we have
, first lets get rid of the quotient and write the expression in the form :
Now we can directly apply the rule stated at the beginning (in which
):
Note that whenever we differentiate a function, we simply "ignore" the constants (we take them out of the derivative).
Given any function of the form
In which
For this example we have
Now we can directly apply the rule stated at the beginning (in which
Note that whenever we differentiate a function, we simply "ignore" the constants (we take them out of the derivative).