Write the Solution Set Using Interval Notation

question 157

Multiple Choice

Write the solution set using interval notation.
-A student scored 74,89 , and 95 on three algebra tests. What must he score on the fourth test in order to have an average grade of at least 85 ?

• A) 30
• B) 65
• C) 82
• D) 86

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Definitions:

Winner's Curse

A phenomenon in auctions where the winning bidder overpays due to overestimation of the item's value.

Optimistic Estimate

An estimate that assumes the most favorable conditions and outcomes for a project or investment.

Bid Shading

A strategy in which buyers deliberately bid lower than their actual valuation of the item to save costs, common in auction contexts.

Common Value Auctions

Auctions in which the item for sale has a value that is the same for all bidders, but the bidders have different information about that value.