20 points. Scaler quantity and vector quality

Sara is creating an experiment. her hypothesis states the following. if i increase the air in my tires, then i will get better gas mileage. if this is her hypothesis what column titles do we need in our date table? a. air pressure in tire (psi) and gas mileage (mph) b. air pressure in the atmosphere (psi) and gas mileage (mph) c. miles (m) and gallons per mile (g) d. old battery and new battery

Which is not one of the major climate zones? question 3 options: rain forest polar tropical temperate

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?