The mean score of a placement exam for entrance into a math class is 80, with a standard deviation of 10. Use the empirical rule to find the percentage of scores that lie between 60 and 80. (Assume the data set has a bell-shaped distribution.)

How many mL are in a cubic centimeter? 1,000 10,000 100.000 none of the above

Four friends each flipped a coin different numbers of times. Alice got heads 75% of the time. Mary got heads 8 out of 10 times. Sarah got heads 17 out of 20 times. Ellen got heads ⅗ of the time. Who had the greatest percentage? How do you know?

The minimum degree of rotation by which this octagon can map onto itself is?

O número da casa de seu João é formado pelo numerador e denominador nessa ordem, da fração geratriz da dízima 0,2555 ... Qual o número da casa dele?

How many units and in what direction will the graph of f (x) be shifted to create the graph of f (x+2) ?

The same sequence may be defined in three ways: 1) f (x) = 6x + 5 for x = {1, 2, 3, ... }, 2) a1 = 11 and an + 1 = an + 6 for n = {1, 2, 3, ... } and 3) an = 11 + 6 (n - 1) for n = {1, 2, 3, ... }.

A cell phone plan has a monthly cost that is shown in the table below. What is the correct statement regarding the average rate of change during the 40-minute time of talk?

Jay simplified the expression 3 * (3+12:3) - 4. For his first step, he added 3+12 to get 15. What was Jay's error? Find the correct answer

The sum of two consecutive numbers is - 49 what are they

Yummy Cookies just opened a brand new cookie bakery, ans sales are increasing every month! In January, the baker made 14 carrot cake cookies. In February, the baker doubled the January order, took 5 cookies home to his family, and sold the rest.