Here is the inequality you can enumerate:
5x >= 200, this means the money you sold for cakes must be larger or equal to your goal
x <= 100, this means you cannot sell more than 100 cakes, because you only have 100 cakes
Solve for them, you will get: 40 <= x <= 100
42/7 =6 she planted 6 in each row
$91 because 10% of 70 is $7 and 20% of 70 is $14 so 7+14+70= $91
