Answer:

Step-by-step explanation:
#Given a significance level of
and
the critical value is,
#the margin of error can then be calculated as:

Hence the margin of error is 3.4363
Answer:
4
Step-by-step explanation:
Find the LCM of 12 and 15.
LCM = 60.
Now divide the LCM by the two numbers.
60/12 = 5, 60/15 = 4.
As the sister got an hour head start, subtract one.
5-1=4.
Therefore it will be 4 hours.
Answer:
87/100
Step-by-step explanation:
Convert the decimal number to a fraction by placing the decimal number over a power of ten. Since there are
2
numbers to the right of the decimal point, place the decimal number over
10
2
(
100
)
. Next, add the whole number to the left of the decimal.
Answer:
8 ^ 20
Step-by-step explanation:
(8 ^ 10) ^2
We know that a^ b^ c = a^ ( b*c)
8 ^ (10*2)
8 ^ 20