Solve the problem.How many liters of a 20% alcohol solution must be mixed with 50 liters of a 70% solution to get a 40% solution?
A. 7.5 L
B. 125 L
C. 75 L
D. 12.5 L
Answer: C
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Solve the problem.Two forces, of 35.2 and 62.6 lb, forming an angle of 73.1°, act at a point in the plane. Find the magnitude of the resultant force.
A. 62.3 lb B. 97.8 lb C. 640.6 lb D. 2108.4 lb
Solve the differential equation.y'' - 4y' + 29y = 0
A. y = e-2x(C1 cos 5x + C2 sin 5x) B. y = ex(C1 cos 2x + C2 sin 5x) C. y = e2x(C1 cos 5x + C2 sin 5x) D. y = C1 e2x + C2 e5x
Determine whether the growth (or decay) is linear or exponential, and answer the associated question.The population of Oak Forest is increasing at a rate of 4% per year. If the population is 87,224 today, what will it be in three years?
A. Linear; 112,224 people B. Linear; 272,139 people C. Exponential; 90,760 people D. Exponential; 98,115 people
A new car dealership has taken an inventory of the vehicles it has in stock. Below is a histogram indicating the number of vehicles in stock in certain price ranges. Use the histogram to answer the question.
Which price category of vehicles does the dealership have the least of?
A. vehicles costing $14,000 - $20,999 B. vehicles costing $28,000 or over C. vehicles costing under $14,000 D. vehicles costing $21,000 - $27,999