The battery in a portable music player is guaranteed to last 17 hours without charging if it is used with headphones and 3 hours if it is used with speakers. If you use headphones and speakers for equal amounts of time, how many minutes will a fully charged battery last?

Plz ( true - false) all triangles have interior angles whose measure sum to 90.

Percent increase and decrease. original number: 45 new number: 18

As voters exit the polls, you ask a representative random sample of voters if they voted for a proposition. if the true percentage of voters who vote for the proposition is 63%, what is the probability that, in your sample, exactly 5 do not voted for the proposition before 2 voted for the proposition? the probability is