A group of scientists are doing a study of elephants in Africa. They take a random sample of 200 elephants, and reveal the data set below. They believe the population of elephants in the area is about 6 times the size of the random sample. What is the estimated total population of male elephants with tusks?

Subtract 8 1/6 - 4 5/6 . simplify the answer and write as a mixed number.

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?

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.