Answer:
172.0336 Meters
Step-by-step explanation:
the probability that a child chosen at random from the school arrives by car is 0.74 .
<u>Step-by-step explanation:</u>
Here we have , Some of the children at a school arrive by car.
30% of the children at the school are boys
60% of the boys at the school arrive by car
80% of the girls at the school arrive by car
We need to find what is the probability that a child chosen at random from the school arrives by car .Let's find out:
Probability of child to arrive by car = Probability of a girl to arrive by car + Probability of a boy to arrive by car
⇒ Probability of a boy to arrive by car = 
⇒ Probability of a boy to arrive by car =
⇒ Probability of a boy to arrive by car =
Also , Probability of a girl to arrive by car = 
⇒ Probability of a girl to arrive by car = 
Putting these values we get:
⇒ 
⇒ 
Therefore , the probability that a child chosen at random from the school arrives by car is 0.74 .
Sample proportion: 190/425 = 0.45
ME = 1.96*sqrt[0.45*0.55/425] = 0.047
-----
95% CI: 0.45-0.047 < p < 0.45+0.047
Answer:
x= -1
Step-by-step explanation:
First to whats in the parentheses it will look like this
4x-12=-16 now add 12 to both sides
4x=-4 now you want x alone so divide 4 into -4
x=-1
To find the absolute value remove abt negative sign in front of a number and to think of all numbers as a positive