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
Answer: A
Mathematics
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Can the following be the lengths of the sides of a right triangle?4, 11, 12
A. Yes B. No
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Solve the problem. Round to two decimal places if needed.A sector of a circle has an area of 72 square feet. Find the central angle (in degrees) that forms the sector if the radius is 3 feet.
A. 18,573.25° B. 37,146.5° C. 917.2° D. 458.6°
Mathematics
Factor the polynomial completely using grouping.6z2 - 5z - 6
A. (6z + 2)(z - 3) B. (3z - 2)(2z + 3) C. (3z + 2)(2z - 3) D. prime
Mathematics
Round as indicated.
to the nearest ten
A. 
B. 
C. 
D. 
Mathematics