John’s piggy bank contained 7 dimes and 3 quarters. he pulled out 1 coin without looking. without replacing the first coin, john then pulled out a second coin. what is the probability that both coins were dimes? express your answer in simplest form.

ill give brainiest answer for to first person to answer.

You are cycling around europe with friends. a cycling festival is starting soon in barcelona. it will take 4.5 hours to cycle there. how many minutes in total is this?

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?

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