A space ship travels at 9^15 miles per hour and traveled continuously for 9^18 hours. Enter the answer, in the form of x, that represents how many miles the space ship traveled.​

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

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

Which is greater, 7 p 5 or 7 c 5? 7p5 7c5