Question

To feed his plants, logan creates a mixture that requires 3/8 cup of plant food for every gallon of water. If he uses 10 1/2 gallons of water, what is the total amount of plant food he needs?

Answer 1

Answer: $3\frac{15}{16}\text{ cups}$

Step-by-step explanation:

Given: To feed his plants, logan creates a mixture that requires 3/8 cup of plant food for every gallon of water.

i.e. For 1 gallon of water, the plant food requires = $\frac{3}{8}\ cup$

Now, For $10\frac{1}{2}$ gallons of water, the plant food requires =$10\frac{1}{2}\times\frac{3}{8}$ cups.

$=\frac{21}{2}\times\frac{3}{8}\\\\=\frac{63}{16}\\\\=3\frac{15}{16}\text{ cups}$

Hence, the total amount of plant food he needs= $3\frac{15}{16}\text{ cups}$

Answer 2

10.5gal(3/8cup/gal)=3.9375 cups  (3 15/16 cups)