HELP ME ASAP NO FILES! AND WILL GIVE BRAINLIEST FOR FIRST CORRECT ANSWER!!

What's the difference between: x≥0 and nonnegative integer. ?

One of the inventors of integrated circuits observed that the number of transistors that fit on an integrated circuit will double every 24 months. what type of relationship most appropriately models this situation?

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny