Answer:
a. 40
Step-by-step explanation:
Given
and
We plug in 2x into .
We now substitute x=-3.
The correct choice is A.
Mount mckinley in alaska is 20,320 feet above sea level. Mauna kea in hawaii is 13,796 feet above sea level. How many more feet
1 answer:
To solve this problem you must apply the proccedure shown below:
1. You have the following information given in the problem above:
- Mount Mckinley is 20,320 feet above sea level.
- Mauna kea is 13,796 feet above sea level.
2. Then, you only need to substract both quantities to solve the exercise, as following:
Therefore, as you can see, the answer is: 6,524 feet.
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Answer:
Probability that a group of 4 Americans watch more than 400 hours of television per year is 0.3264.
Step-by-step explanation:
We are given that a nationwide census is conducted and it is found that the mean number of hours of television watched per year by Americans is 350 with a standard deviation of 220.
A group of 4 Americans is selected.
Let = <u><em>sample mean number of hours of television watched per year</em></u>
The z score probability distribution for sample mean is given by;
Z = ~ N(0,1)
where, = population mean = 350
= standard deviation = 220
n = sample of Americans = 4
Now, the probability that a group of 4 Americans watch more than 400 hours of television per year is given by = P( > 400 hours)
P( > 400) = P(
>
) = P(Z > 0.45) = 1 - P(Z
0.45)
= 1 - 0.6736 = <u>0.3264</u>
The above probability is calculated by looking at the value of x = 0.45 in the z table which has an area of 0.6736.
Hence, the probability that a group of 4 Americans watch more than 400 hours of television per year is 0.3264.
Answer:
4 Cubes
Step-by-step explanation:
A box 4 cm by 6 cm by 8 cm is painted on all six faces.
The volume of the box = L × B × W
V = 4 × 6 × 8 = 192 cm³
The box cut into cubes with the 2 cm sides.
Volume of the 2 cm cube = 2 × 2 × 2 = 8 cm³
The number of cubes from the box =
= 24 cubes
There would be 4 cubes in the middle would be painted only one side.
Periphery cubes of the box are painted on two or more sides.
