For the first part, the possible numbers are anything from 20 to 99. That means that there are 79 possible choices that are greater than 19. Sorry I can't help you with the second part.
Answer:
Step-by-step explanation:
33/4 already reduced (simplified) Improper fraction, rewrite it as a mixed number: 33 ÷ 4 = 8 and remainder = 1 => 33/4 = (8 × 4 + 1)/4 = 8 + 1/4 = 8 1/4
Answer:
31/40
Step-by-step explanation:
13/40 + 18/40
When the 10 is to a negative power you move the decimal to the left. in this case its 5 spots. i believe your answer is .00005003
