Solve the problem.Suppose a charitable organization decides to raise money by raffling a trip worth $500. If 3000 tickets are sold at $1.00 each, find the expected value of winning for a person who buys 1 ticket.

A. -$.81
B. -$.83
C. -$1.00
D. -$.85


Answer: B

Mathematics

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E.

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If r(t) = 7i+3t cos ?tj+4 sin ?tk, evaluate r(t)dt.

What will be an ideal response?

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Check whether the set and the operation form a group. ? ? for × ?

A. no B. yes

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