Estimate by rounding as directed.0.06 + 81 + 0.73; nearest one
A. 85
B. 83
C. 80
D. 82
Answer: D
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Solve the problem.A = ?r2, 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 3.9 cm? (Use 3.14 for ?.)
A. 2.5 cm2 B. 1.3 cm2 C. 2.3 cm2 D. 2.7 cm2
Solve the problem.A polygon with n sides has D diagonals, where D is given by the function D(n) = 
. Find the number of sides n if 77 ? D ? 170.
A. The number of sides is between 13 and 21, inclusive. B. The number of sides is between 14 and 20, inclusive. C. The number of sides is between 12 and 21, inclusive. D. The number of sides is between 15 and 20, inclusive.
Decide whether the perimeter or area would be used to solve a problem concerning the measure of the quantity.Measuring a room for baseboards
A. Perimeter B. Area
An earthquake has an amplitude of 4,000 micrometers and a period of 0.45 second. Find its measure on the Richter scale. Round to one decimal place, if necessary. ?
A. 9.1 B. 8.3 C. 4 D. 3.6 E. 3.9