In a certain laboratory experiment the amount A, in grams, of a radioactive substance remaining after t minutes is given by
.
A: Make a graph of A versus t over the first 60 minutes of the experiment.B: When is there a maximum amount of material present? Round your answer to two decimal places, if necessary.C: What is the maximum amount of material? Round your answer to two decimal places, if necessary.
What will be an ideal response?
A:
?
?
B: After 17.33 minutes.
?
C: 0.75 grams
Mathematics
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A. 
, 
B. 
, 
C. 
, 
D. 
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Solve the problem.The formula C = 20d + 30 describes the total cost of renting a truck, where C is the total cost and d is the number of days the truck is rented. How many days can the truck be rented for $110?
A. 5 days B. 2 days C. 14 days D. 4 days
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Multiply and simplify.(sin x - cos x)(sec x + csc x)
A. tan x - sin x B. cos x - cot x C. cot x + csc x D. tan x - cot x
Mathematics
Change the improper fraction to a mixed number or a whole number.
A. 16
B. 15
C. 
D. 17
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