Rewrite the series using summation notation. Use 1 as the lower limit of summation.52 + 103 + 154 + . . . + 409
A. 
B. 
C. 
D. 
Answer: B
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Decide whether or not the arrow diagram defines a function.DomainRange 
A. No B. Yes
Solve the problem.Some people must eat a low-sodium diet with no more than 2000 mg of sodium per day. By eating 1 cracker, 1 pretzel, and 1 cookie, a person would ingest 149 mg of sodium. If a person ate 8 pretzels and 8 cookies, he or she would ingest 936 mg of sodium. By eating 6 crackers and 7 pretzels, a person would take in 535 mg of sodium. Which of the following statements is true?
A. A cracker contains 30 mg of sodium. B. A cracker contains more sodium than a cookie C. A pretzel contains 49 mg of sodium. D. A cookie contains 71 mg of sodium.
Write as a percent.
A. 7
%
B. 72
%
C. 13
%
D. 1
%
Solve the problem.A geometric progression is a sequence of terms in which each term is r times the preceding term. The sum of the first three terms of such a sequence, where a is the first term, is given by the expression 
. Under what circumstances, if any, is this expression undefined?
A. The expression is undefined for r = -1 B. The expression is undefined for r = 1 C. The expression is defined in all circumstances. D. The expression is undefined for r = 0