Plz help will mark brainlist

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

Savannah is painting a striped background for a mural on a wall that is 1515 yards long. she wants a total of 9696 stripes that are all the same width. which calculation should savannah use to decide how wide to make each stripe?

Pls as soon as ! will award brainliest and 20 ! also the answer is not 22.5 degrees! find the value of x in each case: