When doctors prescribe L-dopa to Parkinson's patients, the typical initial prescription is 1.5 grams for every 50 lbs of the person's weight per day. If Gregory weighs 250 lbs, how many grams of L-dopa will his doctor prescribe per day?

For every 1 kilogram (kg) of a child’s weight, pediatricians prescribe 15 milligrams (mg) of a fever reducer. If Isabella weighs 12 kg, how many milligrams of the fever reducer will the pediatrician prescribe?

In 1906, San Francisco experienced an intense earthquake with a magnitude of 7.8 on the Richter scale. In 1989, the Loma Prieta earthquake also affected the San Francisco area, and measured 6.9 on the Richter scale. Compare the intensities of the two earthquakes.