Simplify.(
- 
)2
A. 21 - 2
B. -4 - 2
C. 10 - 2
D. 10 + 2
Answer: C
Mathematics
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Find the values of x for which the geometric series converges.
A. |x| < 14
B. |x| < 
C. |x| < 1
D. |x| < 7
Mathematics
Find the general solution of the differential equation. Use C, C1, C2, . . . to denote arbitrary constants. If used, do not simplify hyperbolic functions.y'(t) = 7 + e-3t
A. y = 7 - 
+ C
B. y = 7t - 
+ C
C. y = 7t + e-3t + C
D. y = -3e-3t + C
Mathematics
Solve the problem.A boat goes 210 miles downstream in the same time it can go 140 miles upstream. The speed of the current is 8 miles per hour. Find the speed of the boat in still water.
A. 40 mph B. 35 mph C. 32 mph D. 48 mph
Mathematics
Solve the problem.If s varies directly as t2, and s = 72 when t = 3, find s when t is 7.
A. 392 B. 168 C. 21 D. 24
Mathematics