Use a finite sum to estimate the average value of the function on the given interval by partitioning the interval and evaluating the function at the midpoints of the subintervals.f(x) = 3x5 on [1, 3] divided into 4 subintervals
A. 703.2
B. 175.8
C. 58.6
D. 103.8
Answer: B
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Solve the problem.Find a field G = P(x, y)i + Q(x, y)j in the xy-plane with the property that at any point (a, b) ? (0, 0), G is a vector of magnitude 
tangent to the circle x2 + y2 = a2 + b2 and pointing in the clockwise direction.
A. -yi + xj B. xi - yj C. xi + yj D. yi - xj
Solve the problem.The logistic growth function f(t) = 
models the number of people who have become ill with a particular infection t weeks after its initial outbreak in a particular community. How many people were ill after 4 weeks?
A. 39,000 people B. 39,650 people C. 26,271 people D. 240 people
Use the given information to find the exact value of the trigonometric function.cos ? = - 
, sin ? > 0
Find cos 
.
A. - 
B. 
C. 
D. - 
Convert the measurement to the specified units. Round to the nearest tenth of a degree, when necessary.90 miles to kilometers
A. 55.8 kilometers B. 81.9 kilometers C. 144.9 kilometers D. 98.1 kilometers