Solve the problem.The two charts show the weight gain of some people and the weight loss of other people. Use the information given to answer the question below. 
What is the difference between the weight gain of Carl and the weight loss of Ed?
A. 482 grams
B. 3872 grams
C. -3872 grams
D. -482 grams
Answer: B
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Identify the type of sampling described by the proposal.The names of 90 employees are written on 90 cards. The cards are placed in a bag, and three names are picked from the bag.
A. simple random sample B. convenience sample C. stratified sample D. cluster sample E. systematic sample
Determine whether the given function is one-to-one. If it is one-to-one, find a formula for the inverse.f(x) = 
A. Not one-to-one
B. f-1(x) = (x + 1)2
C. f-1(x) = 
D. f-1(x) = x2 - 1, x ? 0
List the elements of the set.The integers from 0 to 4
A. {0, 1, 2, 3} B. {0, 1, 2, 3, 4} C. {1, 2, 3, 4} D. {1, 2, 3}
Solve.The revenue for a small company is given by the quadratic function 
where t is the number of years since 1998 and r(t) is in thousands of dollars. If this trend continues, find the year after 1998 in which the company's revenue will be $1080 thousand. Round to the nearest whole year.
A. 2006 B. 2004 C. 2002 D. 2003