Write the percent problem as a proportion and solve.What is 130% of 4180?
A. 543,400
B. 5434
C. 543
D. 54,340
Answer: B
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Solve the problem.If a rock is thrown vertically upward from the top of a building 80 feet high with an initial velocity of 64 feet per second, the height, h, above ground level after t seconds is given by h = -16t2 + 64t + 80, where h is in feet and t is in seconds. What is the maximum height the rock will reach?
A. 80 ft B. 84 ft C. 144 ft D. 16 ft
Estimate the sum or difference by rounding each number to the nearest ten.
A. 10 B. 20 C. 160 D. 14
Write the number as a decimal numeral.
?
?
A. 13 B. 26 C. 11 D. 24 E. 16
Solve the problem.One number is 7 less than a second number. Twice the second number is 4 less than 5 times the first. Determine the numbers by solving the following system of equations, using x and y to represent the unknown numbers. 
A. -13 and -6 B. 5 and 12 C. 6 and 13 D. 7 and 14