Solve the problem.A freight train leaves a station traveling at 32 km/h. Two hours later, a passenger train leaves the same station traveling in the same direction at 52 km/h. How long does it takes the passenger train to catch up to the freight train?
A. 2.2 hr
B. 3.2 hr
C. 4.2 hr
D. 5.2 hr
Answer: B
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Factor the expression completely. If the polynomial is prime, state this as your answer.a2b2 - 36
A. (b + 6)(b - 6) B. (a2b + 6)(ab - 6) C. (ab + 36)(ab - 36) D. (ab + 6)(ab - 6)
Solve. If needed, round money amounts to two decimal places and all other amounts to one decimal place.The manager of a coffee shop has one type of coffee that sells for $9 per pound and another type that sells for $15 per pound. The manager wishes to mix 80 pounds of the $15 coffee to get a mixture that will sell for $11 per pound. How many pounds of the $9 coffee should be used?
A. 240 pounds B. 160 pounds C. 120 pounds D. 80 pounds
Determine the nature of the solutions of the equation.9x2 + 6x + 1 = 0
A. Two nonreal B. Two real C. One real
Solve the problem.A city is growing at the rate of 0.3% annually. If there were 2,520,000 residents in the city in 1993, find how many (to the nearest ten-thousand) are living in that city in 2000. Use 
.
A. 2,600,000 B. 140,000 C. 6,800,000 D. 2,570,000