Look at the attachment, and please answer my question, thanks!

Emma will roll two number cubes labeled 1 through 6. she will record the sum of the two numbers after each roll. she will roll the two cubes 540 times. how many times should emma expect the sum to equal 5?

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

If you had $1,900,000, how many days would it take you to spend all if you spent $1 a second. (there are 86,400 seconds in a day)