It is already simplified, three goes into three once but three cant go into 32 without there being a remainder.
The mean is 85.2
Explanation:
Add all the numbers together
98+78+84+75+91=426
Divide the sum by the amount of numbers you added together
426/5= 85.2
1) 2.92• 10^-3 2) 2.16•10^7. 3)7.5•10^8
27.33333333 I hope it helps!