Which equation can be used to solve for x in the following diagram?

It takes jonas 7 1/4 minutes to run the mile. it takes mario 8 5/12 to run the mile. how much faster is jonas than mario? 5/6 minute 1 1/3 minutes 1 1/6 minutes 1 1/2 minutesi will give points and brainlest

Could someone with number 1 and 2

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry