22% of former smokers say they tried to quit four or more times before being able to quit smoking. find the probability that the first person who quit smoking is among the first 10 people selected.

Naomi’s parents want to have 50,000, saved for her college education, if they invest 20000 today and earn 7% interest compound annually, about how long will it take them to save 50 thousand

Given right triangle xyz, which correctly describes the locations of the sides in relation to

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?