Aunit dose of levalbuterol hcl contains 3.0 ml in a 0.0417% concentration. how many unit doses are needed in order to obtain 10mg of the active ingredient?

8 unit doses

Step-by-step explanation:

A 0.0417% concentration means that 100 mL of solution contains 0.0417 grams = 41.7 mg of the active ingredient.  

Cross-multiplying  

100 mL 41.7 mg

    x mL 10 mg

100/x = 41.7/10 > x = 1000/41.7 = 23.9808 = 24 mL rounding to the nearest integer.

As a  unit dose of Levalbuterol HCL contains 3.0 mL,  

we need 24/3 = 8 unit doses to obtain 10 mg of the active substance.

168

step-by-step explanation:

first off, we know that he drove 3.5 hours at a rate of 48 mph.

knowing that, we want to see how many miles he drove all-together.

in this case, we can just multiply 48 by 3.5.

48 * 3.5 = 168

answer:   (s+1)(s+4)

step-by-step explanation:

factor s2+5s+4

s2+5s+4

=(s+1)(s+4)