Answer:
71.1
Step-by-step explanation:
ANSWER
1.39
EXPLANATION
The given quadratic equation is

This is the same as,

Comparing to

We have
a=2, b=3,c=-8
Using the quadratic formula, the solution is given by:

We substitute the values to get,


The positive root is

to the nearest hundredth.
Find the mean for both:
Sierra: 2 + 11 + 12 + 13 + 15 = 53
53/5 =10.6
Median is the middle value = 12
Alek: 9 + 11 + 11 + 12 + 13 = 56
56/5 = 11.2
Median = 11
A: The medians do not equal the mean.
B: Sierra's are more spread out, ( no identical ages and a greater range ).
C: Sierra's mean is less than Alek.
D. Sierra has an outlier (2).
The answer would be B
I solved it this way. I’m guessing you should replace the zeros with these numbers here.