If the sales tax in your city is 4.9\%4.9%4, point, 9, percent, and an item costs \$21 $21 dollar sign, 21 before tax, how much tax would you pay on that item? round to the nearest hundredth or cent.

Which expression calculates the speed in meters per second of an object that travels a distance of 100 m every 20 seconds

For the chance to be team captain, the numbers 1-30 are put in a hat and you get two chances to pick a number, without replacement. which formula correctly shows how to find the probability that you choose the number 1 and then 2?

Using only the digits 5, 6, 7, 8, how many different three digit numbers can be formed if no digit is repeated in a number?