Explain how you do 140 divided by 7/8 plz

Janets dinner costs 7.50. if she wants to leave a 10% tip how mich extra should she leave

Why do interests rates on loans to be lower in a weak economy than in a strong one

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?