Write the decimal as a fraction or mixed number in lowest terms.7.2
A. 7
B. 7
C. 
D. 1
Answer: A
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Find an antiderivative of the given function.f(s) = 5 
- 4
A. 
s4/3 - 4s
B. 
s3/4 - 4s
C. 
s4/3 - 4s
D. 
s3/4 - 4s
Solve the problem.Use the formula N = Iekt, where N is the number of items in terms of the initial population I, at time t, and k is the growth constant equal to the percent of growth per unit of time. A certain radioactive isotope decays at a rate of 0.2% annually. Determine the half-life of this isotope, to the nearest year.
A. 3 years B. 347 years C. 250 years D. 151 years
Solve the problem.The gas mileage, y, of a compact car is related to the speed, x, at which the car is driven between speeds of 40 mph and 90 mph. For example, from the graph we see that the gas mileage for the compact car is 45 miles per gallon if the car is driven at a speed of 
The linear equation y = - 
x + 65 relates gas mileage, y, to the speed of the car, x. Estimate the gas mileage if the compact car is traveling 88 mph.
A. 109 miles per gallon B. 53 miles per gallon C. 78 miles per gallon D. 21 miles per gallon
Rationalize the denominator. Assume that all variables represent positive real numbers.
A. 11
B. 
C. 7
D. 