Answer:
12k-18
Step-by-step explanation:
u multiply 6(2k)-6(3) and ur answer will be 12k-18
I assume the equation is

then let
.


The right side is real-valued and positive, and only on the left side do we have an imaginary term, which tells us

Then




but again we omit the negative solution, so that

Answer:
6 people build fences in 3 days
1 person would take 6*3=18 days
Thus 10 people would take 18/10 days
i.e 1.8 days
1 day 3 hours
Note- not taking the number of fences in the calculation as it is same in both the case
Step-by-step explanation:
The empirical rule states that approximately 68/95/99.7% of a normal distribution lies within 1/2/3 standard deviations. So the answer is 68%.