Answer:
1. a) 4.8 lb
I) 8%
II) 0.384 lb
2. a) 12.5 lb
I) 8%
II) 1 lb
Step-by-step explanation:
Let's begin by listing out the given variables:
mass of pesticide (m) = 12 lb,
40WP (40 weight percent) means the active ingredient comprises 40% of the total mass of the pesticide
a) amount of active ingredient = mass of the pesticide * weight percentage of the active ingredient
x = 12 * 40% = 12 * 0.4
x = 4.8 lb
I. If the soil has an absorption rate of 92%, that means 8% will go into the run-off
The percentage of active ingredient that will end up in the run-off = the percentage of the active ingredient (100%) - the absorption rate
y = (100 - 92)%
y = 8%
II. amount of of active ingredient that will end up in the run-off = amount of active ingredient * the percentage of active ingredient that will end up in the run-off
z = x * y = 4.8 * 8% = 4.8 * 0.08
z = 0.384 lb
2. Let's list out the variables given, we have:
mass of pesticide = 25 lb, weight percent of active ingredient = 50% = 0.5
amount of active ingredient = mass of the pesticide * weight percentage of the active ingredient
x = 25 * 0.5
x = 12.5 lb
I. If the soil has an absorption rate of 92%, that means 8% will go into the run-off
The percentage of active ingredient that will end up in the run-off = the percentage of the active ingredient (100%) - the absorption rate
y = (100 - 92)%
y = 8%
II. amount of of active ingredient that will end up in the run-off = amount of active ingredient * the percentage of active ingredient that will end up in the run-off
z = x * y = 12.5 * 8% = 12.5 * 0.08
z = 1 lb
