Im sooo confused please help and explain.

In a school 2/3 of the students study a language of those who study a language 2/5 study french

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

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.