Look at the picture.
ΔABD and ΔBCD are similar, therefore:

Use Pythagorean theorem:
Prime numbers are numbers that only have a factor of one and its self.
Exactly half of these integers are odd (1, 3, 5, ..., 29) so the probability of selecting an odd number is

.
Answer:
20 years
Step-by-step explanation:
9000/ 100= 900 = 10%
900/2= 450
450 x 2= 900
900 x 10= 9000
Now we multiply 10 by 2 because we doubled the value of our 450 into a 900 and now we get 20.