It would be 13... if I did my math right.
To find the mean, add up all the test scores and divide by the number of tests:
524/10 = 52.4.
They have different masses
Answer:
the answer is the 3rd one
Answer: 54
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Explanation:
The first ratio is 1:6. The jump from 1 to 6 has us multiplying the 1 by 6 to get 6.
1*6 = 6
So we follow the same rule of "multiply by 6" to go from 9 to 54 (9*6 = 54)
Or you can use a proportion to get
1/6 = 9/x
1*x = 6*9 ... cross multiply
x = 54
and we get the same answer