Answer:
46 i think
Step-by-step explanation:
Answer: 360
Justification:
The pattern is * 2, * 3, * 4,...
Missing number = 72 * 5 = 360.
Answer:
The rate of change is of of the area when the radius is 4 centimeters
square centimeters.
Step-by-step explanation:
Area of a circle:
The area of a circle of radius r is given by:

Implicit derivative:
To solve this question, we have to derivate implictly the equation as a function of t. Thus:

The radius of a circle is increasing at a rate of 6 centimeters per minute.
This means that 
Find the rate of change of the area when the radius is 4 centimeters.
This is
when
. Thus

The rate of change is of of the area when the radius is 4 centimeters
square centimeters.
6 3/4 ÷ 4 1/2 = 27/4 ÷ 9/2 = 27/4 × 2/9 = 3/2 = 1.5
answer: 1.5 times