2 ft 7 in
3 ft 11 in
6 ft 9 in
-----------------add
11 ft 27 in........and since 1 ft = 12 inches, then 27 inches = 2 ft 3 inches
so it would become : 13 ft 3 inches <==
Answer:
- 33 1/3 liters of 30%
- 16 2/3 liters of 45%
Step-by-step explanation:
Let x represent the liters of 45% solution needed. Then the amount of HCl in the mix is ...
0.45x +0.30(50 -x) = 0.35(50)
0.15x = 0.05(50) . . . . . simplify, subtract 0.30(50)
x = (0.05/0.15)(50) = 50/3 = 16 2/3 . . . liters of 45% HCl
33 1/3 liters of 30% and 16 2/3 liters of 45% HCl are needed.
_____
<em>Comment on the solution</em>
You may notice that the general solution to a mixture problem of this sort is that the fraction of the mix that is the highest contributor is ...
(mix % - low %) / (high % - low %) = (.35 -.30) / (.45 -.30) = .05/.15 = 1/3
Answer: -0.36
Step-by-step explanation:
Given: Mean : 
Standard deviation : 
We know that the formula to calculate the z-score is given by :-
For x=8.2 minutes, we have
Hence, the z-score for this amount of advertising time = -0.36
1237.15=1237.15
There will be no negative number
Answer:
3x+26
Step-by-step explanation:
7(x+1)-4x+19
7x+7-4x+19
7x-4x+7+19
3x+7+19
3x+26
