Sebastian has another account at the bank that pays 2 ½ % simple interest. How much interest will he earn in 8 years on an initial deposit of $250 assuming he does not add or withdraw from the account.

Given (1+cosx)/(sinx) + (sinx)/(1+cosx) =4, find a numerical value of one trigonometric function of x. a. tanx=2 b. sinx=2 c. tanx=1/2 d. sinx=1/2

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.