A commuter wants to determine the average price of gas in the area. Which is the best method of collecting a population sample so that the commuter can answer this question? Check gas prices at several gas stations near the commuter’s house.

Find the gas prices over the past several years at a single particular gas station in the area.

Look up a number of randomly selected gas stations in the area to find out gas prices.

Survey friends on social media to see how much people are paying for gas.

10 points? me . its important ‼️‼️

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

Math i have no idea how to do a and b