The concentration C, in milligrams per deciliter, of a drug in the bloodstream t hours after an injection is given by
.
A: Make a graph of C versus t over the first 5 hours after the injection.B: When is the drug concentration at a maximum? ?Round your answer to two decimal places, if necessary.C: What is the maximum concentration? Round your answer to two decimal places, if necessary.
What will be an ideal response?
?
?
B: After 1.28 hours.
?
C: 1.90 milligrams per deciliter
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Solve the problem.A driver wants to gauge the fuel efficiency of her vehicle at speeds of 30 mph and above. She notices that traveling at an average speed of 40 mph results in a rating of 40 mpg, where as at an average speed of 50 mph, her car rates 35 mpg. Find an equation to model the gas mileage y for an average speed of x mph.
A. y = 2x + 60
B. y = 2x + - 20
C. y = -
x + - 20
D. y = -
x + 60
Solve the formula for the indicated letter.
Perform the indicated operation.10.4 cm × 2
A. 20.8 cm B. 208 cm C. 2.08 cm D. 5.2 cm
Solve the problem.The following table shows the number of dog collars, in thousands, produced by Allied Pet Products in the three years considered. For a function of the form f(x) = ax2 + bx + c that fits this data, what is the value of b? 
A. -1.6 B. -1.2 C. 1.9 D. 2.3