Hello free points have a great day

Which inequality statement describes the two numbers on a number line? "? 7 and a number 5 units to the right of ? 7"

The weight of a radioactive isotope was 96 grams at the start of an experiment. after one hour, the weight of the isotope was half of its initial weight. after two hours, the weight of the isotope was half of its weight the previous hour. if this pattern continues, which of the following graphs represents the weight of the radioactive isotope over time? a. graph w b. graph x c. graph y d. graph z

Plz : denver is about 5,200 feet above sea level. which number line best represents this integer?