Answer:
The mean of the number of real messages you should expect to find in your inbox is 22.75
Step-by-step explanation:
According to the given data we have the following:
reported spam email messages percenatge=91%
number of messages in inbox=25
Therefore, In order to calculate the mean of the number of real messages you should expect to find in your inbox we would have to use the following formula:
Mean ( np ) =number of messages in inbox*reported spam email messages percenatge10 * 0.6 = 6
Mean ( np ) =25 *0.91= 22.75
The mean of the number of real messages you should expect to find in your inbox is 22.75
Answer:
The diagonal is irrational because it is a product of a rational and an irrational number
Step-by-step explanation:
The options are not given. However, the question is still answerable.
Given
Shape: Square
Length: Rational
Since the side length is said to be rational, I'll answer the question based on whether the diagonal is rational or not.
Having said that:
The diagonal (d) of a square with side length (l) is calculated using Pythagoras theorem.
Take positive square root of both sides
Split:
Recall that the side length (l) is rational.
However, is irrational.
So, the product of l and will be irrational
Hence:
The diagonal is irrational
2
product of 5 and 5= 25
take 25 and subtract the 5 and u get 20
20 divided by 10 is 2
13 is your answer my friend!
Answer:
Step-by-step explanation:
You need to set up a proportion.
(21 - 15) / 21 = 4/(x + 4)
6 / 21 = 4/(x + 4)
2/7 = 4/(x + 4)
2(x + 4) = 7*4
2x + 8 = 28
2x + 8-8= 28 - 8
2x = 20
x = 20/2
x = 10