The important clue from the problem, would be (w/v). This would indicate that the percent has units of weight per volume. We calculate as follows:
Grams solute = .30 g solute / mL solution (450 mL) = 135 g of solute.
Hope this answers the question. Have a nice day.
Answer:
The expression is 
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of
, and a confidence level of
, we have the following confidence interval of proportions.

In which
z is the z-score that has a p-value of
.
The margin of error is of:

90% confidence level
So
, z is the value of Z that has a p-value of
, so
.
What expression would give the smallest sample size that will result in a margin of error of no more than 3 percentage points?
We have to find n for which M = 0.03.
We have no prior estimate for the proportion, so we use
. So






The expression is 
Answer:
D. -2
Step-by-step explanation:
The zero of a function is always along the x-axis and in this case that's -2.
Hope this helps :)
Answer:
2) -2/3
4) 17/5
Step-by-step explanation:
2)-4/3= 2g
-4=6g
g=-2/3
4) 9=5r - 8
-5r=-17
r=17/5