Duffy repairs shoes. He decided to raise all
of his prices by the same fixed rate. In the
past a pair of sneakers was $11.00 for a repair.
He raised his price on sneaker repair to
$13.53. If the cost of fixing formal shoes
previously was $15.00, what would you expect
the new price to be?

1. the wheeling bridge in west virginia is about 307 meters long. if you walk with a stride of about meter, about how many steps would it take you to cross this suspension bridge?

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of florida was approximately two times the population of california. b. the population of florida was approximately twenty times the population of california. c. the population of california was approximately twenty times the population of florida. d. the population of california was approximately two times the population of florida.

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.