Answer: 
Step-by-step explanation:

Where;

Answer: 8 hours
Step-by-step explanation:
The pay is for 2 weeks which means that she worked for 80 hours.
At 80 hours, the regular income she should make is:
= 80 * 13.15
= $1,052
The total she made from overtime is therefore:
= 1,209.84 - 1,052
= $157.84
When she works overtime, she gets paid at a rate of a time and half. This means she gets:
= 13.15 * 1.5
= $19.73
The hours of overtime she worked is therefore:
= 157.84/19.73
= 8 hours
The level of each growth factor is an illustration of a combination
There are 90 ways of combining one level from each growth factors
<h3>How to determine the
number of combinations?</h3>
From the complete question (see attachment), we have the number of levels in each growth factor is:
Lighting = 3
Age = 5
Temperature = 2
Humidity = 3
So, the number of combination (n) is:
n = 3 * 5 * 2 * 3
n = 90
Hence, there are 90 ways of combining one level from each growth factor.
Read more about combination at:
brainly.com/question/11732255
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I think its b because a coefficient is a number that is placed in front of a variable and the 4 is just a constant