Answer:
The answer is "36.14%"
Step-by-step explanation:
The complete question is given in the attached file please find it.
Using z-table to find the value.

This means that between 42 and 48 months, 36.14 % of scanners could be predicted will break down.
Answer:
a²+2a-8
Step-by-step explanation:
You can't do anything because they aren't the same term
Answer:
The last one
Step-by-step explanation:
Because 0 < -2 -2, 0 <-4. It is not a true statement. It tell you that the middle one is wrong. The first one is wrong to because there are no equal sign.
Answer:
6 : 11
Step-by-step explanation:
the ratio 6 : 11 applies to all linear measure in the similar polygons
Both side lengths and perimeter are linear, hence
ratio of both is 6 : 11