Simplify.23 ? 72
A. 256
B. 128
C. 384
D. 392
Answer: D
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Find d2y/dx2 without eliminating the parameter.x = 
+ 7t, y = 
- 2t, t ? -7
A. 
B. 
C. 
D. 1
Solve the problem.Find the least squares line through the points 
and 
A. y = -6x + 2 B. y = -6x + 34 C. y = -18x + 2 D. y = -18x + 34
An insurance company uses the mortality table below to calculate their risk when writing life insurance policies. Age at Death (males)50 51 53 54 Mortality Rate0.0043 0.0049 0.0052 0.0055 If this company insures 12,000 54-year old men, how many are expected to die before they reach their 55th birthday?
What will be an ideal response?
Solve the problem.The following data represents the height (in inches) and weight (in pounds) of 9 randomly selected adults. 
Graph the data on a scatter diagram treating height as the independent variable. Find an equation of the line containing the points (62, 126) and (70, 180). Express the relationship using function notation. Graph the line on the scatter diagram. Interpret the slope of the line. Use the line to predict the weight of a person who is 64.6 inches tall. Round to the nearest pound.
Height (inches)
What will be an ideal response?