Please help! I hate algebra and don't understand anything!

The price of a coat increased from $78 to $92. what is the price increase percentage?

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.

Find the greatest common factor of the followig monomials 46g^2h and 34g^6h^6