Jessica wants to earn at least a B this grading period, which is an average of an 85. So far Jessica has earned a 90, 75, and 88 on three tests. What is the least grade she can score on the fourth test to reach her goal?

Answer asap ill give ! ’ a sample of radioactive material decays over time. the number of grams, y , of the material remaining x days after the sample is discovered is given by the equation y = 10(0.5)^x. what does the number 10 represents in the equation? a. the half-life of the radioactive material, in days b. the amount of the sample, in grams, that decays each day c. the time, in days, it will take for the samples to decay completely d. the size of the sample, in grams, at the time the material was discovered