Answer: 50.24 square centimeters.
Step-by-step explanation:
Given: The radius of the circular lens of a magnifying glass = 4 centimeters
The area of a circle is given by :-
, where r is the radius of the circle.
Then the area of the circular lens of a magnifying glass is given by :-

Hence, the area of the circular lens of a magnifying glass = 50.24 square centimeters.
Answer:
x
=
3
or
1
Step-by-step explanation:
Answer: Divide the first equation, −4x + 8y = 16, by 2
Step-by-step explanation:
The correct answer will be A 40
Answer: D) x - 0.2x
Step-by-step explanation:
The hat has a regular price of x dollars.
This price is reduced by 20% so the relevant expression for the discount is; 20% * x or; 0.2x
The discounted price will be the price of the hat less the discount which means the formula will be;
= Price - discount
= x - 0.2x