According to the 2000 U.S. Census, Philadelphia, Pennsylvania, has a population of 1,517,550, of whom 812,443 are male. If 500 citizens of Philadelphia are selected at random, what is the probability that at least 250 of them will be male? (U.S. Bureau of the Census.)
What will be an ideal response?
0.9487
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The monthly cost of driving a car depends on the number of miles driven. Julia found that in October it cost her $200 to drive 300 mi and in July it cost her $350 to drive 600 mi. Express the monthly cost C as a function of the distance driven d assuming that a linear relationship gives a suitable model.
Select the correct answer. a. C = –50d+0.5 b. C = 50d – 0.5 c. C = 0.5d + 50 d. C = 2d + 50 e. C = 0.5d – 50
Find the indicated matrix.Let A = 
and B = 
. Find 2A + B.
A. 
B. 
C. 
D. 
Find the missing factor or exponent(s).(x?y?)6 = x18y54
A. 3, 9 B. 3, 6 C. 6, 9 D. 12, 48
Write the equation in vertex form. Identify the vertex.y = x2 + 3x + 1
A. y = 
2 - 
; 
B. y = (x + 3)3 - 9; (-3, -9)
C. y = (x + 3)3 - 9; (3, -9)
D. y = 
2 - 
; 