Solve the problem.A bike road race starts at an elevation of 920 feet and passes through 5 stages where the elevation changes by 390 feet, 470 feet, 73 feet, 185 feet, and -158 feet. At what elevation does the race end?
A. -2196 ft
B. 2196 ft
C. 87 ft
D. 1880 ft
Answer: D
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Set up the percent proportion, and write "unknown" for the value that is not given. Recall that the percent proportion is 
= 
. Do not try to solve for any unknowns.101% of what is 61?
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Simplify the expression by combining like terms if possible.7x2 - 5 + 5x2 + 4
A. 11 B. 11x2 C. 12x2 - 1 D. 2x2 - 1
Solve the problem.A company has the following production function for a certain product: p(x, y) = 31x0.3y0.7 .Find the marginal productivity with fixed capital, px .
A. 9.3
0.7
B. 9.3xy0.7
C. 9.3
1.3
D. 9.3
0.7
Determine the most appropriate metric unit to go in the blank. Choose from km, m, cm, mm, L, mL, kg, g, and mg.The carton contained 470 
of juice.
A. g B. mL C. L D. mm E. mg