Solve.A certain radioactive isotope decays at a rate of 0.125% annually. Determine the half-life of this isotope, to the nearest year.
A. 400 years
B. 6 years
C. 241 years
D. 555 years
Answer: D
Mathematics
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Compute the gradient of the function at the given point.
A. -12i - 28j - 21k B. 4i + 4j - 3k C. -3i - 7j + 7k D. -12i + 28j - 21k
Mathematics
Perform the indicated operations and simplify the result. Leave the answer in factored form.
÷ 
A. x - 6
B. 
C. 
D. 
Mathematics
Solve the problem.A mechanic is testing the cooling system of a boat engine. He measures the engine's temperature over time. Use a graphing utility to fit a logistic function to the data. What is the carrying capacity of the cooling system?
A. y = 
, 315°F
B. y = 
, 315°F
C. y = 
, 312°F
D. y = 
, 307°F
Mathematics
Find the requested number.5 more than 10 times a number is 105. What is the number?
A. 90 B. 10 C. 94 D. 5
Mathematics