Answer:
Step-by-step explanation:
Since the life of the brand of light bulbs is normally distributed, we would apply the the formula for normal distribution which is expressed as
z = (x - u)/s
Where
x = life of the brand of lightbulbs
u = mean life
s = standard deviation
From the information given,
u = 1300 hrs
s = 50 hrs
We want to find the probability that a light bulb of that brand lasts between 1225 hr and 1365 hr. It is expressed as
P(1225 ≤ x ≤ 1365)
For x = 1225,
z = (1225 - 1300)/50 = - 1.5
Looking at the normal distribution table, the probability corresponding to the z score is
0.06681
For x = 1365,
z = (1365 - 1300)/50 = 1.3
Looking at the normal distribution table, the probability corresponding to the z score is
0.9032
Therefore
P(1225 ≤ x ≤ 1365) = 0.9032 - 0.06681 = 0.8364
Answer:
tuesday is answere .........
It’s a’b Fosho Fosho I just got done with the test
Answer:
<h3>Tomas added 6 to both sides of the equation instead of subtracting 6</h3>
Step-by-step explanation:
Find the complete question in the comment section.
Given the equation 2x+6y=12 to represent the total cost, where x represents the number of pounds of granola and y represents the number of pounds of walnuts.
If he buys 3pounds of granola, and he need to get amount of walnut, he should have substituted x = 3 into the expression to get y as shown:
Comparing the calculation with Tomas's, we can see that Tomas added 6 to both sides of the equation on line 3 instead of subtracting 6 from both sides of the equation. This was Tomas first error.
Answer:
y-2=-1/2(x-6)
or y-4=-1/2(x-2
Step-by-step explanation:
Trying 2 write a point slope equation with the given points.
The first step in getting a point slope equation, i.e. of the form (y-y1)=m(x-x1), is to find the slope.
m=(y2-y1)/(x2-x1)
m=(4-2)/(2-6)
m=2/-4=-1/2
Next, you plug in either of the points into the formula as (x1,y1).
The answer could have been either
y-2=-1/2(x-6)
or y-4=-1/2(x-2)
