-36+x<8
Answer must be simplified

Please help!

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

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

The total cost of anja’s trip to the dentist was $628.35. she paid a flat fee of $89.95 which included the checkup and cleaning and then had 4 cavities filled, each of which cost the same amount. which shows the correct equation and value of x, the cost of each cavity filling?