Answer:
The concentration of the drug is 5ug/uL
Step-by-step explanation:
The first step of the problem is the conversion of the quantities of the drug in mg and mL to ug and uL.
In a rule of three problem, the first step is identifying the measures and how they are related, if their relationship is direct of inverse.
When the relationship between the measures is direct, as the value of one measure increases, the value of the other measure is going to increase too.
When the relationship between the measures is inverse, as the value of one measure increases, the value of the other measure will decrease.
Unit conversion problems, like this one, is an example of a direct relationship between measures.
First step: Conversion of 125mg to ug
Each mg has 1,000ug. So:
1mg - 1,000ug
125mg - xug
x = 1,000*125
x = 125,000 ug
Second step: Conversion of 25 mL to uL
Each mL has 1,000uL. So:
1mL - 1,000uL
25mL - x uL
x = 25*1,000
x = 25,000uL
Concentration:

The concentration of the drug is 5ug/uL
Answer:
1:20
Step-by-step explanation:
Imagine taking 15 minutes off of 55 minutes, that will make it 40 minutes. So you are at 2:00 right now. Subtract the remaining 40 minutes and you will get 1:20
Most graphing calculators will do weighted averages pretty easily. It is mostly a matter of data entry.
mx = -2
my = 10
(x, y) = (mx, my)/10 = (-0.2, 1)
Answer:

Un-formatted answer:
2^x - 3
Step-by-step explanation:

Find the total number of tickets sold by multiplying the number of students by the number of tickets each student sold:
23 x 44 = 1012 total tickets.
Each ticket sold for $7, now multiply the total tickets sold by the price of a ticket:
1012 x 7 = $7,084 total money