I think this is the correct answer: * Zc x (sigma/sqrt of n)
c= .95 (Zc of 1.96)
0.711*
Answer:
20% are black cats.
Step-by-step explanation:
This is 40% of 50%
= 0.40 * 0.50
= 0.20
= 20%
Answer:

Step-by-step explanation:
For this case we have the following expression:

We need to remember that the natural log and the exponentiation with the base the euler number e are inverse operations, and if we apply exponentiation on both sides of the equation we got this:

We have the identity operator for this 

And that would be our final answer for this case.
Answer:
a. 14,000 pesos
b. 23 years
Step-by-step explanation: