Answer:a
Step-by-step explanation:
Answer:

Step-by-step explanation:
Given

Required
Determine the number of gallon for 870 miles
To do this, we simply substitute 870 for miles in the ratio above
So, we have:

Convert to fraction

Multiply through by 870





G is correct.
(12+34+27+27+36+42+15+28+32+47+30):11=30
The mean is 30.
So with standard deviation, the greater it is the greater the spread is.
Since distribution 3 has the greatest standard deviation, it has the greatest spread.
The last two (multiplying and dividing by a negative number on both sides) are the answer. Good luck and have a nice day!