In the given problem, (a) identify the percent; (b) identify the whole; and (c) identify the part. Write "unknown" if the answer cannot be found in the problem.21 pizzas is what percent of 96 pizzas?
A. (a) 21%; (b) unknown; (c) 96 pizzas
B. (a) 21%; (b) 96 pizzas; (c) unknown
C. (a) unknown; (b) 21 pizzas; (c) 96 pizzas
D. (a) unknown; (b) 96 pizzas; (c) 21 pizzas
Answer: D
Mathematics
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Find the particular solution to the given differential equation that satisfies the given conditions.y'' + 4y = 0, y = 3 at x = 0 and y = 5 at x = ?/4
A. y = ex(5 sin 2x + 3 cos 2x) B. y = (3 + 5x)e2x C. y = 5 sin 2x + 3 cos 2x D. y = 3 sin 2x + 5 cos 2x
Mathematics
Find the center of mass of a thin plate of constant density covering the given region.The region bounded by y = 6 - x and the axes
A. 
= 18, 
= 18
B. 
= 6, 
= 6
C. 
= 36, 
= 36
D. 
= 2, 
= 2
Mathematics
Estimate the slope of the curve at the indicated point.
A. 2
B. 
C. - 
D. -2
Mathematics
Add.-19 + (-22)
A. -3 B. 41 C. 3 D. -41
Mathematics