Rewrite the trigonometric expression in terms of sine. 1 - 2cos^2r -sin ^2r - 1
-1 + 2sin ^2r
-1 - 2sin ^2r
1 - sin ^2r

Cora bought a package of erasers. there are 4 pink erasers and 12 blue erasers. what is the ratio of pink erasers to blue erasers?

Can someone me out here number 4 plz

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