Solve the problem.The energy cost of a speed burst as a function of the body weight of a dolphin is given by 
where w is the weight of the dolphin (in kg) and E is the energy expenditure (in kcal/kg/km). Suppose that the weight of a 
dolphin is increasing at a rate of 4.5 kg/day. Find the rate at which the energy expenditure is changing with respect to time.
A. -11.0225 kcal/kg/km/day
B. -0.0014 kcal/kg/km/day
C. -0.0064 kcal/kg/km/day
D. -2.8746 kcal/kg/km/day
Answer: C
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The concentration C, in milligrams per deciliter, of a drug in the bloodstream t hours after injection is given by the following table. Use an exponential model for these data to determine the initial concentration of the drug in the bloodstream. Round your answer to two decimal places. t 1 2 3 4 C 33.93 30.20 26.88 23.92?
A. 33.98 milligrams per deciliter B. 38.12 milligrams per deciliter C. 38.18 milligrams per deciliter D. 33.93 milligrams per deciliter
Divide and simplify.
÷ 
A. 
B. 15
C. 
D. 
Provide an appropriate response.Use the equation (Dividend) = (Divisor)(Quotient) + (Remainder) to complete the following. 
= x3 - 2x2 + 4x - 8 + 
implies x4 - 17 = (x + 2) x 
+ 
.
A. x3 - 2x2 + 4x - 8; 
B. x3 - 2x2 + 4x - 8; 1
C. x3 - 2x2 + 4x - 8; 2
D. x3 - 2x2 + 4x - 8; x + 2
If the following number is a composite number, write it as a product of prime factors. Otherwise, identify it as prime.126
A. 14 ? 3 ? 3 B. 2 ? 3 ? 3 ? 7 C. 2 ? 3 ? 7 D. 2 ? 2 ? 3 ? 3 ? 7