The answer is

the probability of choosing an orange marble is 2/10 because there are 2 orange marbles and 10 marbles in total.
the probability of choosing a green marble is 2/9 because there are 2 green marbles and 9 marbles in total (because you already picked one marble out of the bag thereby decreasing the total number of marbles in all).
when you multiply the probability of these two events you get .04444 which is the probability of both events happening simultaneously.
Answer: 90 words per minute
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Work Shown:
270 words : 3 minutes
270/3 words : 3/3 minutes ..... divide both parts by 3
90 words : 1 minute
Brayden can type 90 words per minute (wpm).
24 cups
Make it a ration
3:0.5
x:4
Cross multiply
0.5x=12
x=24

1) Since in the USA 8 x 10 ^9 messages are sent every month, that means that approximately 8 billion messages are sent.
2) We can Prime factorize it:
Note that on the right side we've picked only prime numbers. In this case, 2 and 5.
So we can rewrite 8 x 10^9 as prime factors.

3) Hence, the answer is: