Solve the problem.A person puts $30 into a bank account on January 1, $35 on February 1, $40 on March 1, and so forth. How much has the person put into the bank account by December 30?
A. $690
B. $1380
C. $720
D. $510
Answer: A
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Find y".y = sin(4x2ex)
A. 8xex cos (4x2ex) + 4x2ex cos (4x2ex) B. -8ex sin(4x2ex) - 8xex sin(4x2ex) C. 4(x2 + 4x + 2)ex cos(4x2ex) - 16xe2x(x3 + 4x2 + 4x) sin(4x2ex) D. (x2 + 4x + 2)ex cos(4x2ex) + 4xex(x3 + 4x2 + 4x) cos(4x2ex)
Use the given information to determine whether the sets are equal. U = {1, 2, 3, 4, 5, 6, 7, 8} A = {1, 3, 5, 7} B = {2, 3, 4, 5, 6}(A ? B)', A' ? B'
A. Not equal B. Equal
Solve the problem.A person is watching a boat from the top of a lighthouse. The boat is approaching the lighthouse directly. When first noticed, the angle of depression to the boat is 13° 12'. When the boat stops, the angle of depression is 49° 49'. The lighthouse is 200 feet tall. How far did the boat travel from when it was first noticed until it stopped? Round to the nearest foot.
A. 668 ft B. 706 ft C. 729 ft D. 684 ft
Use a calculator to solve the equation on the interval [0, 2?). Round the answer to two decimal places.cos x = 0.56
A. 0.98, 5.30 B. 0.98, 4.12 C. 0.98, 2.16 D. 0.98, 2.55