Edwardo thinks of a number between 1 and 20 that has exactly 5 factors. what number is he thinking of?

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?

The probability that an adult possesses a credit card is .70. a researcher selects two adults at random. by assuming the independence, the probability that the first adult possesses a credit card and the second adult does not possess a credit card is:

Aramp rises 4 feet over a distance of 10 feet. what is the length of the ramp?