Percentage grade averages were taken across all disciplines at a particular university, and the mean average was found to be 83.6 and the standard deviation was 8.7. if 18 classes were selected at random, find the probability that the class average is less than 80. a. 0.7427 b. 0.0396 c. 0.0235 d. 0.1730

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it

its an acute right triangle

step-by-step explanation:

6e14 is the answer.

combine all like terms then its just a 2 step equation