In a geometric series, the sum of the first four terms is ten times the sum of the first two terms. if r > 1, find the common difference

Which expression is equivalent to sq-80

What is the value of x in the equation7x+2y=48 when y=3

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