Find the sum.1 +2 + 3 + . . . + 363
A. 132,132
B. 131,769
C. 65,703
D. 66,066
Answer: D
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Find an equation for the surface consisting of all points P for which the distance from P to the x-axis is times the distance from P to the yz-plane. Select the correct answer.
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Solve the problem.The rates of death (in number of deaths per 100,000 population) for 1-4 year olds in the United States between 1980-1995 are given below. (Source: NCHS Data Warehouse) 
A logarithmic equation that models this data is y = 822.99 - 167.55 ln x where x represents the number of years since 1900. Use this equation to predict the rate of death for 1-4 year olds in 2005.
What will be an ideal response?
Solve the problem.The city bridge has 6 lanes, all carrying equal numbers of cars. If 252 cars drive across the bridge, how many cars cross in each lane?
A. 42 cars B. 48 cars C. 258 cars D. 43 cars
Solve the problem.There are 9 members on a board of directors. If they must select a subcommittee of 6 members, how many different subcommittees are possible?
A. 84 B. 720 C. 60,480 D. 531,441