Question

The directions for mixing an insect spray say to use 1 1/2 ounces of chemical in each gallon of water. How many ounces of chemical should be mixed with 3 4/5 gallons of​ water? First, estimate the answer to the application problem. Then find the exact answer.

Answer 1

Given that
`1(1)/(2)` ounces of chemical required for each gallon.

Total amount of chemical required for
`3(4)/(5)` gallons water will be product if
`1(1)/(2)` and
`3(4)/(5)` that is approximately 2*4 = 8 ounces (
`3(4)/(5)` means 3+(
`(4)/(5)`) 3.8 ≈4 and
`1(1)/(2)` means 1+(
`(1)/(2)`) 1.5≈2)

Exact amount = 1.5*3.8 = 5.7 ounces.