Submit test $A = \pi r^2$, where r is the radius, in centimeters. By approximately how much does the area of a circle decrease when the radius is decreased from 4.0 cm to 3.8 cm? (Use 3.14 for $\pi$.) A. 5.024 cm$^2$ B. 4874 cm$^2$ C. 2512 cm$^2$ D. 5.224 cm$^2$

          Submit test
$A = \pi r^2$, where r is the radius, in centimeters. By approximately how much does the area of a circle decrease when the radius is decreased from 4.0 cm to 3.8 cm? (Use 3.14 for $\pi$.)
A. 5.024 cm$^2$
B. 4874 cm$^2$
C. 2512 cm$^2$
D. 5.224 cm$^2$

Submit test
A = π r^2, where r is the radius, in centimeters. By approximately how much does the area of a circle decrease when the radius is decreased from 4.0 cm to 3.8 cm? (Use 3.14 for π.)
A. 5.024 cm^2
B. 4874 cm^2
C. 2512 cm^2
D. 5.224 cm^2

Added by Olga P.

Calculus: Early Transcendentals

James Stewart 8th Edition

Instant Answer

Solved by Expert Joseph David

Step 1

Find the area of the circle with radius 40 cm: A = πr^2 = 3.14 x 40^2 = 5024 cm^2 Show more…

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Submittest Awhere r is the radius in centimeters. By approximately how much does the area of a circle decrease when the radius is decreased from 40 cm to 3.8 cm? Use 3.14 for Ï€. OA. 5.024 cm^2 OB. 8.4.874 m^2 OC. 2.512 m^2 OD. 0.5.224 cm^2