I need serious help : Complete the explanation of how an estimate helps
you to place the decimal point when multiplying
2.7 x 7.3.

By estimating with whole numbers, 3 x( )=( ) helps me know that the decimal point should
be placed so that the answer is close to ( ).

Having a hard time understanding this question (see attachment).

Assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.

You went to a restaurant and spent $53.25 on the meal. there was a 6% sales tax. what was the amount of money, not including a tip, you spent at the restaurant?