Solve the problem.The decay of 865 mg of an isotope is given by A(t) = 865e-0.028t, where t is time in years. Find the amount left after 97 years. Round to the nearest milligram.
A. 56 mg
B. 29 mg
C. 841 mg
D. 57 mg
Answer: D
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Solve the problem.A glass has circular cross sections that taper (linearly) from a radius of 7 cm at the top of the glass to a radius of 6 cm at the bottom. The glass is 14 cm high and full of lemonade. How much work is required to drink all the lemonade through a straw if your mouth is 8 cm above the top of the glass? Assume the density of lemonade equals the density of water. Round to two decimal places when appropriate.
A. 2.67 J B. 3.8 J C. 0.85 J D. 48.71 J
Subtract.4 - 12
A. -16 B. -8 C. 16 D. 8
Use the given information to find the exact value of the trigonometric function.sin ? = - 
; The terminal side of ? lies in Quadrant IV.
Find cos 
.
A. - 
B. - 
C. 
D. 
Solve the problem.Allied Plumbing spent $71,260 this year on health insurance alone. If total sales were $677,100, what percent of total sales was spent on health insurance? Round to the nearest tenth of a percent, if necessary.
A. 9.5% B. 1.1% C. 10.5% D. 95%