ANSWER

EXPLANATION
The given function is

We take natural log of both sides;

Recall and use the product rule of logarithms.

This implies that:


We now differentiate implicitly to obtain;

Multiply through by y,

Substitute y=x²cosx to obtain;

Expand:

Answer:
The miles-per-gallon rating of this car is 20.83.
Step-by-step explanation:
This question can be solved by a rule of three.
What is the miles-per-gallon rating of this car?
How many miles for 1 gallon?
4.8 gallons are used for 100 miles. So
4.8 gallons - 100 miles
1 gallon - x miles



The miles-per-gallon rating of this car is 20.83.
15x + 4 would be the algebraic expression
Answer:
273.7
Step-by-step explanation:
first fine the sides that isn't the base.
triangle area formula: (b*h)/2
(14*9)/2 = 63
since there are 3 sides you multiply this by three.
63*3=189
then find the base.
same formula since its a triangle.
(12.1*14)/2 = 84.7
now add them both up:
84.7+189 = 273.7
hope this helps!