a.
In order to find the common ratio, we just need to divide a term by the term that comes before it.
So using the terms 20 and -5, we have:

b.
The recursive rule can be found with the formula:

Where an is the nth term and q is the ratio. So we have:

c.
The explicit rule can be written as:

Where an is the nth term, a1 is the first term and q is the ratio. So:
Start: 8 a. m.
Finish: 1 : 30 p.m. = 13 hours 30 minutes
13 h 30 min - 8 h = 5 h 30 min
She should record 5 hours and 30 minutes on her time card for the day.
For the dot plot write down the numbers from 18 to 26 and then plot how ever many points there are of each value
C because u have 3/7 which is a fraction
6% = 0.06
400 * 0.06 = 24
400 + 24 = 424
Answer is $424 total value invest in one year with 6% rate