7th grade math. ill give the thing for the first answer.

For two days in a row, gas prices hovered around price p. On the first day, they were d dollars above price p, resulting in a price of $2.19 per gallon. On the second day, they were d dollars below price p, resulting in a price of $2.07. What price p are they hovering around? How much is the price fluctuating day by day?

What is the arc length when θ =pi over 3 and the radius is 5 cm? (5 points) 5 pi over 3 cm 10 pi over 3 cm 16 pi over 3 cm pi over 3 cm

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

Suppose you are an avid reader and are looking to save money on the cost of books instead of paying about $20 for each book, you decide to look into purchasing a kindle for $120 you can purchase e-books for about $5 each 1. find the slope-intercept equation for the cost of the hard copy of books using x to represent the number of books 2. find the slope-intercept equation for the cost of the kindle with cost of e-books using x to represent the number of books