Answer:
a) The average salary of firefighters in Portugal is $583.
b) The standard deviation of the salary of firefighters in Portugal is $319.8
Step-by-step explanation:
We are given the following in the question:
a) Standard Deviation, σ = $145.80
We are given that the distribution of salary of professor is a bell shaped distribution that is a normal distribution.
Formula:
A salary of $510.10 has a z-score of -0.50.
Putting values, we get,
Thus, the average salary of firefighters in Portugal is $583.
b) Mean, μ = $2,132
We are given that the distribution of salary of computer programmers is a bell shaped distribution that is a normal distribution.
Formula:
The salary of $2,291.90 has a z-score of +0.50
Putting values, we get,
Thus, the standard deviation of the salary of firefighters in Portugal is $319.8
Answer: -2
Step-by-step explanation:
Answer:
29 is your answer. I hope this helps you! Let me know if I got something wrong or if you need more help :)
Step-by-step explanation:
First, apply distributive property to 3(2+8). 3×2 and 3×8.
Add 6 and 24.
Simplify 
. is the same as 4×4. 4 times 4 is 16.
Add 15 and 30.
Subtract.
29 is your answer. I hope this helps you! Let me know if I got something wrong or if you need more help :)
Answer:
X= -4 and X =2.
Step-by-step explanation:
use the graph .... and if you wanna be sure.
you use the quadratic formular.
Answer:
3a, 13cm 5, 1:200
Step-by-step explanation:
In the question 3 you just have to divide all of those numbers with that 5000, maybe also make them cm so it makes more sense. So 650m = 65000cm:5000= 13cm
then for the question 5, make the km to cm, so 4.2km would be 420000cm. Then you have to divide that 420000cm with the 21 cm, so 420000:21= 200. Then the scale should be 1:200
I had difficulties with these as well. If you need extra help with the task 3 please pm me :)
