If a tabletop has a diameter of 42 in, Detremine the surface area to the nearest inch? (π = 3.14)
a. 1,384 in^{2}
b. 1,319 in^{2}
c. 1,385 in^{2}
d. 5,539 in^{2}
c. The area of a circle is πr^{2}. The diameter = 42 in, radius = 42 ÷ 2 = 21 in, so (3.14)(21)2 = 1,384.74 in^{2}. Rounding to the nearest inch, the answer is 1,385 in^{2}. If you select a, you rounded the ?nal answer incorrectly. If you select d, you used the diameter rather than the radius.