The reduced row echelon form of the augmented matrix of a system of equations is given. Find the solutions of the system. 
A. No solution
B. 
for any real number w
C. 
D. 
Answer: D
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Solve the problem.A surveyor standing 70 meters from the base of a building measures the angle to the top of the building and finds it to be 35°. The surveyor then measures the angle to the top of the radio tower on the building and finds that it is 50°. How tall is the radio tower?
A. 13.47 m B. 12.35 m C. 34.41 m D. 18.76 m
Solve.On an expressway off-ramp, the road slopes downward five feet per 111 feet. Using a signed number, find the rate at which the road drops per foot.
A. - 
ft per foot
B. - 
ft per foot
C. - 
ft per foot
D. - 5 ft per foot
Perform the indicated operations.(7x9 + 3x8 - 3x7 - 7) + 
A. 9x48 - 4 B. 10x9 + 9x8 - 10x7 - 4 C. 10x18 + 9x16 - 10x14 - 4 D. 10x9 + 9x8 + 10x7 + 6
Solve.When Paula set off to drive to her friend's house, the odometer read 6957.9 miles. When she arrived at her friend's house, the odometer read 7022.1 miles. How far had she driven?
A. 64.3 miles B. 65.2 miles C. 64.2 miles D. 74.2 miles