Estimate the product by first rounding each number so that there is one nonzero digit.7.1 × 35
A. 400
B. 280
C. 2800
D. 28
Answer: B
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Multiply the rational expressions. 
? 
A. -5x + 5
B. 
C. 5x - 5
D. - 
For the experiment described, write the indicated event in set notation.From six job applicants, two people are selected for an interview. The names of the applicants are Ruth, Kim, Nancy, Jeff, Mark, and Lisa. Represent the event "Lisa is selected" as a subset of the sample space.
A. {L and R, L and K, L and N, L and J, L and M, L and L} B. {L and R, L and K, L and N, L and J, L and M} C. {Lisa, Ruth} D. {Lisa}
Write an equation for the parabola with vertex at the origin.Focus 
A. y = - 
x2
B. y2 = -8x
C. x2 = -8y
D. x = - 
y2
Find the exact value under the given conditions.sin ? = - 
, 
< ? < 2?; cos ? = - 
, ? < ? < 
Find sin (? - ?).
A. 
B. 
C. 
D. 