Answer:
Dude
Step-by-step explanation:
There's nothing here
P(z < 3)
From the normal distribution table,
P(z < 3) = 0.9987
Answer:

Step-by-step explanation:
we know that
The density is equal to the mass divided by the volume
Let
x-----> the mass of marble
y----> the volume of marble
z----> the density of marble

in this problem we have


substitute and solve for x


3 less then x.......x - 3
is equal to 13...= 13
x - 3 = 13 <==