Answer: First Option is correct.
Step-by-step explanation:
Since we have given that
Mean = 70 inches
Standard deviation = 3 inches
Average basket ball player = 79 inches
Since it is normally distributed assume with 5% significance .
So, it becomes,
At 0.05 level of significance , 0.0013 = 0.13% of the adult male population is taller than the average basketball player .
Hence, First Option is correct.
Answer:
There should be 125 litters of pure peroxide added to produce a new product that is 28% peroxide.
Step-by-step explanation:
The problem provides us with an equation we can use to find the concentration C of the new mixture, which is:
which will give us the concentration C as a decimal number.
We are interested in getting a concentration of 28%, which is written as 0.28 in decimal form. This is our C.
Now we can substitute it into the equation:
and now we can solve for x. We can start by multiplying both sides of the equation by (x+500) so we get:
Next, we can distribute dhe 0.28 on the left of the equation and we can also multiply the 0.1(500) on the right side, so we get:
so now we can subtract an x from both sides so we get:
which yields:
Now, we can subtract a 140 from both sides, so we get:
Which yields:
and finally we can divide both sides into -0.72 so we get:
So we need to add 125 litters of pure peroxide to produce a new product that is 28% peroxide.
Answer:
7.5cm²
Complete question:What is the surface area of the 8-sided figure?
Step-by-step explanation:
Consider the half of the 8-sided die i.e the pyramid ABCDE:
As the base is 6 of the perimeter, so each side of the base is 6/4=3/2
Now, the distance between the tallest points is 2 cm, so the height of Pyramid ABCDE is 1 cm.
Considering the right triangle EOM:
EO=1, OM= 3/4 (it is half of AB=3/2) and EM is the hypothenuse, so by the pythagorean theorem length of EM is
5. So side EBC has area
6. The total area is 8*Area(EBC)=