Find the sum.13 + [14 + (-16)]
A. -17
B. 15
C. 11
D. 43
Answer: C
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Estimate the value of the quantity.The table gives dye concentrations for a cardiac-output determination. The amount of dye injected was 
Plot the data and connect the data points with a smooth curve. Find the area under the curve using rectangles. Use this area to estimate the cardiac output.
Dye concentration (mg/L)
Time (sec)
A. 8.1 L/min B. 222.7 L/min C. 0.1 L/min D. 16.2 L/min
Simplify the expression.x - [9x - (x - 4)]
A. -9x - 4 B. -4x + 4 C. -7x - 4 D. -7x + 4
Solve.A rotating beacon is located a distance d from a long wall. The distance d is given by 
, where t is the time measured in seconds since the beacon started rotating. Solve the equation for t.
A. t = 
arctan 
B. t = 2? arctan 
C. t = 2? tan 
D. t = 
tan 
Write the fraction in lowest terms.
A. 46
B. 
C. 
D. 45