How to rationalize a denominator

Estimate 4020 : 16 by first rounding each number so that it has only 1 nonzero digit.

Which is bigger 2/3 or 14/21?

A rectangular prism has a volume of 432 in. The height of the prism is 9 in. What are the dimensions of the base?

The price of a newly issued stock varies sinusoidally during the first 10 days after its initial offering and is modeled by P (t) = log (2t+1) sin (t) + 20, where t is in days.

878 people live in africa, 3340 live in asia, 29 in europe 292 in america and 491 in egypt. what percent lives in asia? i

Find the answer to this equation x + 28 = 52

Joel made egg sandwiches and tuna sandwiches in the ratio 2:3. He then made 15 more tuna sandwiches and the ratio changed to 1:3. How many sandwiches did Joel make in all show your work and explain how u found your answer.

Timmy has x bushels of apples, he sells 10 bushels and then gets a shipment of 4y bushels of apples. Which expression represents the number of bushels Timmy now has?

Chad drove 168 miles in 3 hours and has 280 more miles to go. How fast (in miles per hour) did he drive the first 3 hours? Explain how you got your answer.

Verify the identity. Show your work. (1 + tan2u) (1 - sin2u) = 1