Solve the problem.A sample of 200 grams of radioactive substance decays according to the function 
where t is the time in years. How much of the substance will be left in the sample after 40 years? Round your answer to the nearest whole gram.
A. 1 gram
B. 0 grams
C. 2465 grams
D. 58 grams
Answer: D
Mathematics
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Use the table of values of f to estimate the limit.Let f(?) = 
, find 
f(?).
A. limit does not exist B. limit = 0 C. limit = 9.2106099 D. limit = 4
Mathematics
Evaluate the integral.
A. 
tan-1 
+ C
B. 
tan-1 4x + C
C. 4 tan-1 
+ C
D. 
tan-1 (x + 4) + C
Mathematics
Determine whether the given function is one-to-one. If it is one-to-one, find a formula for the inverse.f(x) = 
A. f-1(x) = 
B. f-1(x) = x3 + 1
C. Not one-to-one
D. f-1(x) = x3 - 1
Mathematics
Use FOIL to multiply.(4x + 2)(x - 5)
A. 4x2 - 18x - 10 B. x2 - 18x - 19 C. x2 - 10x - 18 D. 4x2 - 19x - 10
Mathematics