A drink coaster in the shape of a circle has
an area of 19.63 square inches. Find the
diameter of the coaster.

The diameter of the coaster is 5 cm.

Step-by-step explanation:

Given,

The area of the circle = 19.63 sq inch

To find the diameter, we need to find the radius

Formula

The area of a circle with radius(r) = π sq cm

According to the problem,

π  = 19.63

or, =

= 6.2459

or, r = = 2.499 (approx)

= 2.5 cm

Hence the diameter of the circle  = 2 × 2.5 cm = 5 cm

d is correct

step-by-step explanation:

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step-by-step explanation: