I hate this app why doesnt this app help at all

It's 90 °f in the shop with high humidity. what pressure will be shown on the high-side pressure gauge (ac system on)?             a.  10 to 50 psi    b.  40 to 140 psi  c.  210 to 290 psi  d.  at least 350 psi

Explain how you might determine the rate of weathering on a sample rock

Explain how earth is like a giant bar magnet. how is our magnetic field made?