There's a test with 100 questions all having an option for an answer of a b c d or e. if you guessed on all the questions what is the probability you would get 25 right. explain how you got to this conclusion

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

How do you write y-10=2 (x-8) in standard form

Eden has a part time job. she is paid ? 7.20 an hour the week she worked 18 and a half hours how much is she paid