Answer:
128,000
Step-by-step explanation:
I=prt
I=80,000 x 15 x 4
I=128,000
The scale factor is the bigger over the smaller, so
is the scale factor.
To find x, we just use a proportion Biggest to Smallest:

4x = 48
x = 12
Answer:
He plowed 50 rows.
Step-by-step explanation:
Use proportions
1/4 = x/200
then cross multiply to find x.
4x=200
Divide both sides by 4
x= 50
He plowed 50 rows.