# Let f be the function that determines the area of a circle (in square cm) given the radius of the circle…

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**Question:**

Let f be the function that determines the area of a circle (in square cm) given the radius of the circle in cm, r. That is, f(r) represents the area of a circle in square cm) whose radius is r cm. Use function notation to complete the following tasks.

a. Represent the area (in square cm) of a circle whose radius is 3.4 cm.

b. Represent how much the area (in square cm) of a circle increases by when its radius increases from 10.2 to 10.21 cm

c. Represent the area of 4 circles that all have a radius of 13.6 cm.

d. A circle has a radius of 27 cm. Another larger circle has an area that is 56 square cm more than the first circle. Represent the area of the larger circle.

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