Use the formula for the general term (the nth term) of a geometric sequence to find the indicated term of the sequence with the given first term, a1, and common ratio, r.Find a4 when a1 = 6, r = -5.
A. -125
B. -750
C. 750
D. 3750
Answer: B
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Find the total area of the region between the curve and the x-axis.y = x2 - 6x + 9; 2 ? x ? 4
A. 
B. 
C. 
D. 
Solve the problem.Express cos(A + B + C) in terms of sin A, sin B, sin C, cos A, cos B, and cos C.
A. cos A cos B cos C - sin A sin B cos C - sin A sin C cos B + sin B sin C cos A B. cos A cos B cos C + sin A sin B cos C + sin A sin C cos B - sin B sin C cos A C. cos A cos B cos C - sin A sin B cos C - sin A sin C cos B - sin B sin C cos A D. sin A cos B cos C + sin B cos A cos C + sin C cos A cos B - sin A sin B sin C
Choose the expression which is equivalent to the given expression.
A. tan 7° B. cot2 7° C. tan2 7° D. cot 7°
Solve the problem.The temperature at the South pole was -17° at 8 am. At 3 pm, it was 40°. By how many degrees did the temperature rise?
A. by 23° B. by -23° C. by -57° D. by 57°