9 1/2 * 15.15 = $143.925 dollar
Answer:
130279000000
Step-by-step explanation:
e+n=10^n
Consider the suggested option:
1) if in 20 gr. of 50% solution given, then pure salt in this mix is 0.5*20=10 gr., and pure water is 0.5*20=10 gr.
2) after Maya added 5 gr. pure salt is 10+5=15 gr. Total mass of mix is 15(pure salt)+10(pure water)=25 gr.
3) new solution is 15/25=0.6 or 60%.
Answer: 25 gr. of 60% salt solution.
a. This information is given to you.
b. We want to find
so we first transform 
to the standard normal random variable 
with mean 0 and s.d. 1 using
where 
are the mean/s.d. of . Now,
where 
is the CDF for .
c. The 76th percentile is the value of 
such that
Transform to and apply the inverse CDF of .
