Write the expression using a single radical sign. Assume that all variables represent positive real numbers. Simplify the radicand if possible.
A. 
B. ab 
C. 
D. ab 
Answer: B
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Find the work done by F over the curve in the direction of increasing t.F = 6yi + 
j + (3x + 6z)k; C: r(t) = ti + t2j + tk, 0 ? t ? 2
A. W = 0
B. W = 34 + 
C. W = 34 + 20
D. W = 57 + 20
Provide an appropriate response.Find the perimeter of the given figure.
A. 95 ft B. 59 ft C. 225 ft 4 in. D. 93 ft 8 in.
Collect like terms.-5a - 6b - 4a
A. -15ab B. -9a - 4b C. -9a - 6 D. -9a - 6b
Solve. Round your answer to the nearest tenth, if necessary.An object is thrown upward from the top of a 
building with an initial velocity of 48 feet per second. The height, h, of the object after t seconds is given by the quadratic equation 
When will the object hit the ground?
A. In 5 seconds B. In 160 seconds C. In 2 seconds D. In 7 seconds