Solve the problem.The table lists how financial aid income cutoffs (in dollars) for a family of four have changed over time. Use the midpoint formula to approximate the financial aid cutoff for 1985. 
A. $36,000
B. $21,000
C. $57,000
D. $18,000
Answer: A
Mathematics
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Solve the problem.Find the expected number of girls in a family of 7 children.
A. 4.5 B. 4 C. 3.5 D. 4.25
Mathematics
Write the standard form of the equation of the circle with radius r and center (h, k).r = 4; (h, k) = (10, 6)
A. (x - 10)2 + (y - 6)2 = 4 B. (x - 10)2 + (y - 6)2 = 16 C. (x + 10)2 + (y + 6)2 = 16 D. (x + 10)2 + (y + 6)2 = 4
Mathematics
Find the inverse of the matrix, if possible.
A. 
B. 
C. 
D. 
Mathematics
Write the vector in terms of the unit vectors i and j.v = 
A. (-7 + i) + 2j B. -7 + 2j C. -7i + 2 D. -7i + 2j
Mathematics