Answer:
Step-by-step explanation:
surface area of sphere=4πr²=4π×12²=576π
≈576×3.1416
≈1809.5616 cm²
cost to cover=1809.5616×0.05=$90.47808≈$90.48
9514 1404 393
Answer:
blue
Step-by-step explanation:
If two red marbles are removed, 1 red is returned. The number of reds is reduced by 1, and the number of blues is unchanged.
If two blue marbles are removed, 1 red is returned. The number of reds is increased by 1, and the number of blues is decreased by 2.
If one of each is removed, one blue is returned. The number of reds is reduced by 1, and the number of blues is unchanged.
So, at each step, the number of blue marbles is unchanged or reduced by 2. That is, it only changes by an even number. The number of blues is initially odd, so can never reach zero.
The last marble in the bag is blue.
Frequency
= (pi)/(2pi)
= 1/2
Answer:
first, you distribute
-2x-12=8x-48+2
then, you combine like terms
-2x-12=8x-46
next, you subtract 8x from both sides
-2x-8x-12=-46
You add 12 to both sides.
-10x=-34
finally, you divide -10 from both sides
x=34/10 or x=17/5
Step-by-step explanation:
Answer:
3192 persons! ✔️
Step-by-step explanation:
From the statement, we know that μ = 40 [minutes] and σ = 6 [minutes]
There are 3900 people. And we need to find how many of the lie within one standard deviation below the mean and two standard deviations above the mean.
We need to find the probability between: 34 minutes and 52 minutes. With the help of a calculator we get that the probability is: P(34<z<52) = 0.8186
Therefore, 0.8186×3900 = 3192 persons! ✔️