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9

Step-by-step explanation:

mean=average which means you add all of the numbers and divide by the number of numbers there are, which sounds pretty confusing, but I'll show you! 9+7+11+10+8=45, now you divide 45 by 5, which is how many numbers there are that we had to add. 45 divided by 5 is 9, which means the MEAN/average is 9!

$149.8

Step-by-step explanation:

40% of 350 is 140

7% of 140 is 9.8