Determine whether the matrix is in row-echelon form. If it is, then determine also whether it is in reduced row-echelon form.
A. Yes; yes
B. Yes; no
C. No
Answer: C
Mathematics
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Use the limit comparison test to determine if the series converges or diverges.
A. Diverges B. Converges
Mathematics
Solve the problem.A rotating beacon is located 14 ft from a wall. If the distance from the beacon to the point on the wall where the beacon is aimed is given by a = 14|sec 2?t|,where t is in seconds, find a when t = 0.31 seconds. Round your answer to the nearest hundredth.
A. -38.03 ft B. 24.91 ft C. 31.47 ft D. 38.03 ft
Mathematics
Find the midpoint between the two points.(4, 2) and (3, 0)
A. 
B. 
C. (7, 2)
D. (1, 2)
Mathematics
Solve the problem.The height of a box is 3 inches. The length is three inches more than the width. Find the width if the volume is 210 cubic inches.
A. 3 in. B. 7 in. C. 10 in. D. 70 in.
Mathematics