You have $15 to buy a sketch pad and some pens the sketch pad costs $11 pens cost 40 cents each how many pens we can buy?

What is the smallest integer n such that n\sqrt{2} is greater than 20

1. the following set of data represents the number of waiting times in minutes from a random sample of 30 customers waiting for service at a department store. 4 5 7 10 11 11 12 12 13 15 15 17 17 17 17 17 18 20 20 21 22 22 23 24 25 27 27 31 31 32 a. determine the number of classes and class interval.

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor