Solve the problem.The decay constant for strontium 90 is ? = 0.0244, where the time is measured in years. How long will it take for a quantity P0 of strontium 90 to decay to 
its original size?Enter your answer exactly in the form 
where a is a reduced fraction and b is a real number to four decimal places (no units).
What will be an ideal response?
Mathematics
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Solve the problem.Janet drove 316 kilometers and the trip took 4 hours. How fast was Janet traveling?
A. 79 kilometers/hour
B. 1264 kilometers/hour
C. 80 kilometers/hour
D. 
kilometer/hour
Mathematics
Solve.A signal tower is 57 meters tall. How tall is it in feet? Round to the nearest tenth if needed.
A. 19.0 ft B. 187.0 ft C. 171 ft D. 17.4 ft
Mathematics
Provide an appropriate response.If costs and expenses are greater than the markup, for a given period, the difference is called:
A. net loss B. reduced price C. markdown D. gross margin
Mathematics
Find the prime factorization of the number.48
A. 2 ? 2 ? 2 ? 2 ? 3 B. 2 ? 2 ? 2 ? 2 C. 2 ? 2 ? 2 ? 2 ? 2 ? 3 D. 2 ? 2 ? 2 ? 2 ? 5
Mathematics