Solve the problem.A barge takes 4 hours to move (at a constant rate) downstream for 40 miles, helped by a current of 3 miles per hour. If the barge's engines are set at the same pace, find the time of its return trip against the current.
A. 7 hours
B. 4 hours
C. 10 hours
D. 80 hours
Answer: C
Mathematics
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Use TRACE to find the value of y for the given value of x.y = -x + 8x = 3
A. 5 B. 15 C. 3 D. -5
Mathematics
Multiply the polynomials using a special product formula. Express the answer as a single polynomial in standard form.(x - 5)2
A. x2 + 25 B. 25x2 - 10x + 25 C. x2 - 10x + 25 D. x + 25
Mathematics
Use the definite integral to find the area between the x-axis and f(x) over the indicated interval.f(x) = x4 - 4x3 + 4x2; [0, 2]
A. 
B. 
C. 
D. 
Mathematics
Determine the continuity of the function at the given points.f(x) = 
at x = 1 and x = 3
A. The function f is continuous at both 
and 
B. The function f is continuous at neither 
nor 
C. The function f is continuous at 
but not at 
D. The function f is continuous at 
but not at 
Mathematics