Divide and then interpret the remainder.An acre is 43,560 sq. ft. How many acres is 100,000 sq. ft.?
A. 2 acres with 29,568 sq. ft. left over
B. 3 acres with 32,595 sq. ft. left over
C. 3 acres with 30,680 sq. ft. left over
D. 2 acres with 12,880 sq. ft. left over
Answer: D
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Find the center of mass of a thin plate of constant density covering the given region.The region bounded by y = 8 - x and the axes
A. 
= 32, 
= 32
B. 
= 
, 
= 
C. 
= 
, 
= 
D. 
= 8, 
= 8
Evaluate.
+ 
+ 
A. 
B. 
C. 
D. 
Solve the problem. Round your answer, if appropriate.One airplane is approaching an airport from the north at 150 km/hr. A second airplane approaches from the east at 202 km/hr. Find the rate at which the distance between the planes changes when the southbound plane is 28 km away from the airport and the westbound plane is 20 km from the airport.
A. -239 km/hr B. -358 km/hr C. -478 km/hr D. -119 km/hr
Provide an appropriate response.Suppose that you are solving a system of 4 linear equations in 4 variables by the Gauss-Jordan method. If you use the transformation 10R2 + R3, which row or rows of the augmented matrix, if any, will change?
A. Row 2 B. Row 3 C. Rows 2 and 3 D. None