give more information
Step-by-step explanation:
The volume would be 5 because in order to find volume you need to divide mass over density. V=m/d
Answer: yes. They all add up to 79
Step-by-step explanation:
<h2>
Answer:</h2>
First day - 25 calls
Second day - 16 calls
Third day - 75 calls
<h2>
Step-by-step explanation:</h2>
You need to set variables and create system of equations first.
First evening= x
Second evening= y
Third evening = z
x+y+z=116
z=3x
y=x-9
Now you plug in the values into the equation x+y+z=116
x+(x-9)+(3x)=116
5x-9=116
5x=125
x=25
You plug in the value of x into the other equations.
x= 25
z= 3*(25)=75
y=(25-9)=16
Rearrange so it corresponds with days...
First day - 25 calls
Second day - 16 calls
Third day - 75 calls
Let X be the number of cell phone minutes used by high school seniors.
X follows Normal distribution with mean μ = 500 and standard deviation σ =50.
The probability that students uses between 400 and 500 minutes is
P(400 < X < 500) = 
= P( -2 < Z < 0)
= P(Z < 0) - P(Z < -2)
= 0.5 - 0.0228
P(400 < X < 500) = 0.4772
The probability that student uses between 400 and 500 minutes is 0.4772
