You have a normal distribution of hours per week that music students practice. The mean of the values is 8 and the standard deviation of the values is 4.

According to the normal distribution model that corresponds to this population, what percentage of the students practice between 6 to 10 hours per week?

Use the graph of the standard normal distribution given below to find the percentage.

38%
34%
19%
30%

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