Given the radius, r, of a circle, find the diameter; or given the diameter, d, of a circle, find the radius.d = 2.6 in.

A. r = 5.31 in.
B. r = 1.3 in.
C. r = 0.65 in.
D. r = 4.082 in.


Answer: B

Mathematics

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Solve.Avegail needs to determine the distance at certain points across a lake. Her crew and she are able to measure the distances shown on the diagram below. Find how wide the lake is to the nearest tenth of a meter.

A. 8.4 m B. 115.3 m C. 143.2 m D. 70 m

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Find the sum.92.31569 + 231 + 9.277 + 98.04 + 2.8056

A. 434.43829 B. 433.53829 C. 433.44829 D. 433.43829

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Use the addition property of equality to solve the equation.t - 1 = 14

A. -13 B. -15 C. 15 D. 13

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Solve the problem.The sales of a mature product (one which has passed its peak) will decline by the function S(t)= S0e-at, where t is time in years. Find the sales after 8 years if  and 

A. 5746 B. 58,065 C. 245,075 D. 11,491

Mathematics