In a student survey, forty part-time students were asked how many courses they were taking this term. the (incomplete) results are shown below: round your answers to 4 decimal places.

# of courses frequency relative frequency cumulative frequency

1 11 ? 11

2 ? 0.425 28

3 12 0.3 ?

what percent of students take exactly two courses?

%

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