The difference of 5 and a number is at least 13

Julia chooses a card at random from her set of cards. what is the probability that the card is labeled cat or hamster?

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”?

The distance between two points is 6.5cm and scale of map is 1: 1000 what's the distance between the two points