This is one of the questions on my math test can someone help me?

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

Which of the following expressions is equal to 2x^2+8

Eric has challenged himself to walk 24,000 steps in 4 days. if eric walks the same number of steps each day, which function represents the number of steps eric still needs to walk to reach his goal with respect to the number of days since he started his challenge? a. y = 8,000x − 24,000 b. y = -8,000x + 24,000 c. y = 6,000x − 24,000 d. y = -6,000x + 24,000