PLEASE HELP, WILL GIVE BRAINLIEST, 20 POINTS. DESPERATE! Complete this Item

(Hint _ x 2 )

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog

Factor the polynomial. b^2 + 4b + 4

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