Answer:
B
Step-by-step explanation:
V = 4/3 * radius^3 * pi = 4/3 * 4^3 * pi = 256 /3 * pi
Answer:
73,15
Step-by-step explanation:
You want to find
P(1000 < X < 3000)
where X is normally distributed with mean 1751 and standard deviation 421. Transform X to Z, so that it follows the standard normal distribution with mean 0 and standard deviation 1 using the relation
X = 1751 + 421Z ==> Z = (X - 1751)/421
Then
P(1000 < X < 3000) = P((1000 - 1751)/421 < (X - 1751)/421 < (3000 - 1751)/421)
… ≈ P(-1.783 < Z < 2.967)
… ≈ P(Z < 2.967) - P(Z < -1.783)
… ≈ 0.9985 - 0.0373
… ≈ 0.9612
so that approximately 96.1% of the students fall in this income range.
The sum is 15/10 in simplest form it's 3/2 and as a mixed number it's 1 1/2 (one and a half)
Answer:
(-1,2)
Step-by-step explanation:
Write out the system in a matrix
3 5 7
2(6 -1 -8 ) Multiply row two by five and add to row one.
1 0 -1 Multiply row 1 by -6 and add it to row two.
6 -1 -8
1 0 -1
0 -1 -2 Multiply bottom row by -1
1 0 -1
0 1 2
x=-1, y=2