Solve the problem.A cylindrical water tank has height 10 m and radius 2 m (see figure). If the tank is full of water, how much work is required to pump the water to the level of the top of the tank and out of the tank? Express the answer in terms of ?. 
A. 19,600,000? J
B. 627,200? J
C. 1,960,000? J
D. 490,000 J
Answer: C
Mathematics
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Find the value of the variable that satisfies the equation.
x - 3 = 1
A. x = 4 B. x = 8 C. x = -8 D. x = -4
Mathematics
Find (f ?g)(x) for the given functions f(x) and g(x).f(x) = 3x + 7 and g(x) = 3x - 7
A. 9x + 14 B. 6x C. 14 D. 9x - 14
Mathematics
Solve the problem.Carla takes a job with a starting salary of $40,000 for the first year with an annual increase of 4% beginning in the second year. What is Carla's salary, to the nearest dollar, in the sixth year?
A. $51,072 B. $49,428 C. $48,666 D. $47,308
Mathematics
Simplify the expression by using the order of operations.2 + 3 ÷ 1 + 4 + 
A. 6 B. 8 C. 9 D. 7
Mathematics