In geometry, heron's formula (sometimes called hero's formula), named after hero of alexandria, gives the area of a triangle by requiring no arbitrary choice of the side as base or vertex as origin, contrary to other formulae for the area of a triangle, such as half the base times the height. use heron's formula to find the area, in square feet, of δabc. (for image type

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?

I’m still confused on how to work the percentages

The letters g e o r g i a are placed in a bag . if you picked a card and knew it was a vowel , what is the probability that it is an a ?