Find the focus and directrix of the parabola.y2 = 28x
A. (7, 7); x = 7
B. (7, 0); x = 7
C. (0, 7); y = -7
D. (7, 0); x = -7
Answer: D
Mathematics
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Rationalize the denominator and simplify. Assume that all variables represent positive real numbers.
A. 
B. 
C. 1
D. 
Mathematics
Simplify.ln e2x - ln e-x/2Enter just a standard polynomial in x with any fractions reduced of form 
.
Fill in the blank(s) with the appropriate word(s).
Mathematics
Solve the problem.If a person puts one penny in a piggy bank on the first day, two pennies in on the second day, three pennies in on the third day, and so forth, how much money will be in the bank after 30 days?
A. $2.33 B. $9.30 C. $0.30 D. $4.65
Mathematics
Simplify.
A. 8p + 4q
B. 
C. 
D. 4p + 8q
Mathematics