Express the number in scientific notation.2500
A. 2.5 × 10-2
B. 2.5 × 10-3
C. 2.5 × 103
D. 2.5 × 102
Answer: C
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Solve the problem.Suppose that R ={(x, y): 0 ? x ? 4, 0 ? y ? 4}, and P is the partition of R into four equal squares by the lines x =2 and y = 2. 
approximate 
by calculatiang the Riemann sum 
, assuming that 
are the centers of the four squares.
A. 96 B. 48 C. 384 D. 192
Solve the problem.Find the equation of the sphere with center = (0, -1, 2) and radius = 5.
A. x2 + (y + 1)2 + (z + 2)2 = 25 B. x2 - (y + 1)2 - (z - 2)2 = 25 C. x2 + (y + 1)2 + (z - 2)2 = 25 D. x2 + (y - 1)2 + (z - 2)2 = 25
Find the mode(s) for the given sample data. 90, 45, 32, 45, 29, 90
A. 45 B. 55.2 C. 90, 45 D. 90
Determine the slope and the y-intercept. Then graph the equation.y = - 
x + 5
A. slope: - 
; y-intercept: (0, 5)
B. slope: 
; y-intercept: (0, -5)
C. slope: 
; y-intercept: (0, 5)
D. slope: - 
; y-intercept: (0, -5)