Solve the problem.How long will it take a sample of radioactive substance to decay to half of its original amount, if it decays according to the function A(t) = 650e-0.189t, where t is the time in years? Round your answer to the nearest hundredth year.
A. 37.94 years
B. 122.85 years
C. 3.67 years
D. 34.27 years
Answer: C
Mathematics
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Find the rectangular equation of the given polar equation.r = cos ?
A. x2 + y2 - y = 0 B. x2 + 2xy + y2 - x = 0 C. x2 + 2xy + y2 - y = 0 D. x2 + y2 - x = 0
Mathematics
Convert the angle to degrees, minutes, and seconds.136.16°
A. 136°9'36'' B. 136°10'36'' C. 136°9'16'' D. 136°7'16''
Mathematics
Provide an appropriate response.How can you rewrite a subtraction of integers problem to make it easier to solve? Give an example.
What will be an ideal response?
Mathematics
Find the slope of the line.
A. -6 B. -1 C. 6 D. 1
Mathematics