Tiana has $70 in an account. The interest rate is 5% compounded annually.
1 answer:
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Let,
the numbers be "x" and "y"
According to the question,
x = 4y ......................................................equation (1)
...................................equation (2)
Taking equation (2)
Substituting the value of "x" from equation (1), we get,
Cross multiplying, we get,
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Now,
Taking equation (1)
x = 4y
Substituting the value of "y", we get
So, the numbers are
and 
the numbers be "x" and "y"
According to the question,
x = 4y ......................................................equation (1)
Taking equation (2)
Substituting the value of "x" from equation (1), we get,
Cross multiplying, we get,
<u />
Now,
Taking equation (1)
x = 4y
Substituting the value of "y", we get
So, the numbers are
Answer:
.b. It is one‐half as large as when n = 100.
Step-by-step explanation:
Given that a simple random sample of 100 batteries is selected from a process that produces batteries with a mean lifetime of 32 hours and a standard deviation of 3 hours.
i.e. s = 0.3
we obtain se of sample by dividing std devitation by the square root of sample size
i.e. s=
when n =100 this = 0.3 and
when n =400 this equals 0.15
We find that when sample size is four times as large as original, std deviation becomes 1/2 of the original
Correction option is
.b. It is one‐half as large as when n = 100.