Answer:
0.04746
Step-by-step explanation:
To answer this one needs to find the area under the standard normal curve to the left of 5 minutes when the mean is 4 minutes and the std. dev. is 0.6 minutes. Either use a table of z-scores or a calculator with probability distribution functions.
In this case I will use my old Texas Instruments TI-83 calculator. I select the normalcdf( function and type in the following arguments: :
normalcdf(-100, 5, 4, 0.6). The result is 0.952. This is the area under the curve to the left of x = 5. But we are interested in finding the probability that a conversation lasts longer than 5 minutes. To find this, subtract 0.952 from 1.000: 0.048. This is the area under the curve to the RIGHT of x = 5.
This 0.048 is closest to the first answer choice: 0.04746.
In this problem it
states that one tenth or only 10% is Canada’s population to the United States.
Hence with the steps we
can identify the population of the United States.
<span><span>1.
</span>10 %
= 32 million or 0.1 = 32 million</span>
<span><span>2.
</span>Then 32
million / 0.1 = 320, 000, 000 million</span>
Therefore there are 320,
000, 000 million living in the United States
Adding one zero. Why the zeroes? It is
the result because of the power of 10 in a hundred percent population coming
from the Canada’s population. Take note that 100% = 320, 000, 000 million of
the USA while 10% of it is Canada so we divide it by 0.1 which is 32, 000, 000
(the power of ten)
It is statistical because there can be a variety of answers.
Quarts = 25 there are 100 in a dollar so you have 25 out of 100
25/100<span />
(6x-1)+20+(x+14)=180
6x-1+20+x+14=180
6x+x+20+14-1=180
7x+33=180
-33 -33
7x=147
7/7x=147/7
x=21
Measure of angle A=:
(6x-1)
6x-1
6(21)-1
126-1
125
Measure of angle A is 125°
Measure of angle C=
(x+14)
x+14
21+14
35
Measure of angle C is 35°
