Answer:
It will take Amy approximately 5 hours to count to 19000
Step-by-step explanation:
Amy counts 60 numbers per minute, since an hour has 60 minutes, this means that Amy will count 60 x 60 =3600 numbers per hour.
Now we divide the quantity of numbers she counts: 19,000 by 3600 (numbers she counts per hour)
÷
Therefore, it will take Amy approximately 5 hours to count to 19000
Answer: The value of the test statistic is z= 1.63 .
Step-by-step explanation:
Test statistic for proportion :
, where p =population proportion.
= sample proportion
n= sample size.
Let p be the proportion of chips do not fail in the first 1000 hours of their use.
As per given, we have
Then, required test statistic would be
Hence, the value of the test statistic is z= 1.63 .
is the result of multiplying (3x-1) to the second power and (x+6) to the second power
Given that we have to find the result of multiplying polynomials (3x-1) to the second power and (x+6) to the second power
"Second power" means the term is raised to power of 2
Therefore,
We have to multiply
We can use the algebraic identity to expand the above expression
Applying these in above expression, we get
Multiply each term in first bracket with each term in second bracket
Simplify the above expression
Combine the like terms
Thus the above expression is the result of multiplying (3x-1) to the second power and (x+6) to the second power