Answer:
The explicit formula

The recursive formula
for 
if 
Step-by-step explanation:
If a sequence is arithmetical then the difference between any of its consecutive terms will be constant
3, 3.25, 3.5, 3.75,

The difference between the consecutive terms remains constant so the sequence is arithmetic.
The explicit formula for an arithmetic sequence is:

Where d is the constant difference between the terms.

is the first term of the sequence.

So

Finally, the recursive formula is:

There is one solution that the intersecting lines have cause two solution doesn't have the same slope.
Write a proportion like so:
4 gallons/30 plants= x gallons/45 plants
Cross multiply to find the value of x
4*45= 180
180/30= 6=x
Final answer: 6 gallons
The answer should be Two and Three ...
$24 in 6 hours.
6 hours = $24
1 hour would be: $24/6 = $4
8 hours would then be: $4 * 8 = $32.
So he would make $32 in 8 hours.
Hope this explains it.