SOMEONE ANSWER QUICK !! Alex has a summer job doing lawn maintenance. he is paid $8 per hour for mowing and an extra $10 for removing weeds. Create and evaluate an algebraic expression to calculate how much Alex earns if it takes him 4 hours to mow a lawn and he removes the weeds.

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