There are 10 students participating in a spelling bee. in how many ways can the students who go first and second in the bee be chosen

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')

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

Determine if the equation defines y as a function of x: 2xy = 1. yes o no