Solve the problem.The decay of 291 mg of an isotope is given by 
where t is time in years. Find the amount left after 47 years. (Round to the nearest milligram.)
A. 52 mg
B. 101 mg
C. 285 mg
D. 103 mg
Answer: D
Mathematics
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Integrate the function.
dx
A. 
- 
B. 
+ 
C. 
+ 
D. 
- 
Mathematics
Solve the problem.The distance it takes to stop a car varies directly as as the square of the speed of the car. If it takes 112 feet for a car traveling at 40 miles per hour to stop, what distance is required for a speed of 
per hour?
A. 189.62 ft B. 189.28 ft C. 162.24 ft D. 201.58 ft
Mathematics
Solve the problem.Christina made a chart summarizing her shop's financial performance over the past three years. 
How much money was made in the months described as "Good"?
A. $1000 B. $400 C. $9600 D. $6300
Mathematics
Translate using numbers and symbols.two times the sum of six and ten
A. 2 ? 6 + 10 B. 2 ? 6 ? 10 C. 2(6 + 10) D. (2 + 6) ? 10
Mathematics