Suppose the warranty period on your family's new computer is about to expire and you are debating about whether to
buy a one-year maintenance contract for $130. If you buy
the contract, all repairs for one year are free. Consumer
information shows that 23% of the computers like yours
require an annual repair that costs $320 on the average.
What is the expected value of buying the maintenance
contract?

An electronics manufacturer wants to know if customers would be interested in a detachable keyboard for their tables and if so, what the most important features would be. the manufacturer partners with an electronics store to include copies of the survey with every purchase at that store for one week. which of the following best explains why this random sample is unlikely to be a good representative sample of tablet owners' preferences for a detachable keyboard? a) one week is likely not enough time to get a large enough sample. b) most people won't bother to send in the survey, which is likely to skew the results c) there is no way to verify whether the responders to the survey actually own a tablet d) the survey is biased because it was conducted through an electronics store, not the general population

How many days was the temperature above 90 degrees?

Heather is riding a quadratic function that represents a parabola that touches but does not cross the x-axis at x=-6