The answer to your question is 40.4
Answer:
The expression is equal to 1 over 12 factors of r
Multiplying the exponents will create an equivalent expression.
Step-by-step explanation:
We are given the following in the question:

<h3>Properties of exponent:
</h3>


Thus, we can simplify the given expression as:

= 
= 
Thus, the correct answer is:
Option 2) The expression is equal to 1 over 12 factors of r
Option 4) Multiplying the exponents will create an equivalent expression.
In order to isolate any term from an equation we need to clear out any different variable or numbers different from the one we want

in this case I is being multiplied by R, so we need to do the opposite which is divide in order to eliminate

But since this is an equality we must do it on both sides so de equation does not get altered

Then we simplify the equation
It the wiper blade (and arm) made a full rotation, 2 circles would be formed.
One small circle with radius
b, and a larger circle with radius
a+b.
The areas of these 2 circles are respectively:

and

120° is 1/3 of a complete angle 360° which form a circle, so the areas formed by the arm of length b, and the arm + the wiper blade (a+b) are:

and

in squared respectively.
the actual wiped area is

(in squared)
Area of the window is 54*24= 1296 (in squared)
thus, the ratio of the wiped area to the whole area of the window is 351.7/1296=0.271
Converted to percentages, this is 27.1%
Answer: 27.1%