the grades on the last history exam had a mean of 80%. assume the population of grades on history exams is known to be distributed normally, with a
standard deviation of 5%. approximately what percent of students earn a score between 70% and 80%
2.2%
47.7%
50%
52.2%

the ratio of white tiles to blue tiles is 48: 16. the ratio in it's simplest form is 3: 1.

step-by-step explanation:

ratio: take the first number and add a colon next to it, then add the second number after that. make sure the ratio order matches up with the written problem!

simplest form: we can simplify the ratio 48 : 16 by dividing both terms by the greatest common factor (gcf).

the gcf of 48 and 16 is 16.

divide both terms by 16:

48 ÷ 16 = 3

16 ÷ 16 = 1

reducing to simplest form:

48 : 16 = 3 : 1

idk

step-by-step explanation:

i don't know

im pretty sure its

(8,15)

step-by-step explanation: