Solve the proportion for the variable.
A. 20
B. 21
C. 22
D. 13
E. 18
Answer: E
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Solve the problem.Using the digits 0 through 9, how many 5-digit serial numbers can be made if the first digit must be 0 or 1 and digits may not be repeated?
A. 30,240 B. 3360 C. 8 D. 6048
Answer the question on the order of rational numbers.Make a true statement by inserting <, >, or =;
A. > B. < C. =
Find all of the real zeros of the function. Give exact values whenever possible. Identify each zero as rational or irrational.f(x) = x3 - 2x2 - 6x + 12
A. 2 (rational), 2
(irrational), and -2
(irrational)
B. -2 (rational), 
(irrational), and -
(irrational)
C. 2 (rational), 
(irrational), and -
(irrational)
D. 2 (rational), 6 (rational), and -6 (rational)
Find the unknown number in the proportion. Write your answer as a whole number or a mixed number if possible.
= 
A. 2
B. 
C. 
D. 1