The following table shows the earnings for the Juarez family last year. Solve the problem.MonthEarningsMonthEarningsJan.$1400July$1300Feb.$1150Aug.$2450Mar.$2950Sept.$2500Apr.$2300Oct.$2000May$1650Nov.$2350June$2700Dec.$2400The family saved 
of their total income each month. How much savings did they have at the end of June?
A. $812
B. $644
C. $910
D. $850.50
Answer: D
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Find the flux of the vector field F across the surface S in the indicated direction.F(x, y, z) = -10i + 9j + 3k , S is the rectangular surface z = 0, 0 ? x ? 7, and 0 ? y ? 5, direction k
A. 105 B. 0 C. 315 D. -350
Solve the problem.A spherical water tank with an inner radius of 5 m has its lowest point 3 m above the ground. It is filled by a pipe that feeds the tank at its lowest point (see figure). Neglecting the volume of the inflow pipe, how much work is required to fill the tank if it is initially empty? Express the answer in terms of ?. 
A. 
? J
B. 
? J
C. 
? J
D. 
? J
Provide an appropriate response.Which of the following items is undefined and why?tan-1 3 or cos-1 3
What will be an ideal response?
Graph the function.y = 
cot x
A. 
B. 
C. 
D. 