Find the product of (x + 3)(x − 3).

x2 − 6x + 9
x2 + 6x + 9
x2 + 9
x2 − 9

Initially 100 milligrams of a radioactive substance was present. after 6 hours the mass had decreased by 4%. if the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours. (round your answer to one decimal place.)

At a kentucky friend chicken, a survey showed 2/3 of all people preferred skinless chicken over the regular chicken. if 2,400 people responded to the survey, how many people preferred regular chicken?

Indicate the formula for the following conditions: p^c(n,r)=