4 for 16 would be written as 4/16.
Dividing both numbers by 4 it is simplified to 1/4
N = number of compounding periods
Years = log (total / principal) / n * log (1 + rate / n)
Years = log (750 / 500) / 4 * log (1 + .025/n)
Years = log (1.5) / 4 * log (1<span><span>.00625)
</span>
</span> <span>Years = 0.17609125906 / 4 * 0.0027058933759
</span><span>Years = 0.17609125906
</span>
/
<span>
<span>
<span>
0.0108235735
</span>
</span>
</span>
Years =
<span>
<span>
<span>
16.2692348382
</span>
</span>
</span>
Source Calculator
http://www.1728.org/compint.htm
Answer:

And for this case we know this condition:

By the complement rule we know that:

But since the distribution is symmetrical we know that:

So then the statement for this case is FALSE.
b. False
Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Solution to the problem
For this case if we define the random variable of interest X and we know that this random variable follows a normal distribution:

And for this case we know this condition:

By the complement rule we know that:

But since the distribution is symmetrical we know that:

So then the statement for this case is FALSE.
b. False
<span>In
the given number : 4 083 817. Find the 3 digit which is placed in the unit
period.
=> The unit period is the digit that is placed in the ones place of the
number or the first digit on the right.
=> 7 is the unit period
=> 3 is the another unit period
=> 4 is the another unit period.
Thus, 4, 3 and 7 are the 3 digits placed in the unit period of the given
number.</span><span>
</span>
(1/2) / (1/8) =
1/2 * 8/1 =
8/2 reduces to 4...so she can make 4 batches of pancakes