Solve the problem.A chemical solution contains 7% calcium. How much calcium is in 
of solution?
A. 0.245 mL
B. 2.45 mL
C. 5 mL
D. 50 mL
Answer: A
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Solve the problem.A spring on a horizontal surface can be stretched and held 0.5 m from its equilibrium position with a force of 55 N. How much work is done in compressing the spring 3 m from its equilibrium position?
A. 82.5 J B. 990 J C. 165 J D. 495 J
Graph. Be sure to label the vertex.x = -y2 - 2y + 2
A. 
B. 
C. 
D. 
Construct a frequency polygon.
A. Frequency
| Height in inches |
B. Frequency
| Height in inches |
Solve the problem.The average price for a gallon of milk from 1990 to 2000 can be approximated by P(x) = .102(x - 1990) + 1.87, where x is the year. Evaluate P(1998) and interpret the result.
A. P(1998) = 1.95; the average price of a gallon of milk in 1998 was $1.95. B. P(1998) = 2.69; the average price of a gallon of milk in 1998 was $2.69. C. P(1998) = 2.69; the average price of a gallon of milk in 1998 was $2.69 more than in 1990. D. P(1998) = 2.78; the average price of a gallon of milk in 1998 was $2.78.