On Sunday, Sheldon bought 3 1/2 kilograms of plant food. He used 1 2/3 kilograms on his strawberry plants an dused 1/4 kilogram for his tomato plants. Sheldon wants to feed his strawberry plants 2 more times and his tomato plants 1 more time. He will use the same amounts of plant food as before. How much plant food will he need?

6.9

step-by-step explanation:

simple math really

6 1/2 times 0.6 = 3.9

but if you are just doing 6 and not 6 1/2 then the answer is 3.6

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6