Answer:
Step-by-step explanation:
Since the length of time taken on the SAT for a group of students is normally distributed, we would apply the formula for normal distribution which is expressed as
z = (x - u)/s
Where
x = length of time
u = mean time
s = standard deviation
From the information given,
u = 2.5 hours
s = 0.25 hours
We want to find the probability that the sample mean is between two hours and three hours.. It is expressed as
P(2 lesser than or equal to x lesser than or equal to 3)
For x = 2,
z = (2 - 2.5)/0.25 = - 2
Looking at the normal distribution table, the probability corresponding to the z score is 0.02275
For x = 3,
z = (3 - 2.5)/0.25 = 2
Looking at the normal distribution table, the probability corresponding to the z score is 0.97725
P(2 lesser than or equal to x lesser than or equal to 3)
= 0.97725 - 0.02275 = 0.9545
Answer:
The first box is 2.089
The second box is 2.095
Step-by-step explanation:
Between each line there is 1 thousandth added to the number.
Answer:
b) 43.3
Step-by-step explanation:
you use the trig ratio tangent because you are looking for the hypotenuse
so the equation should be <u>tan60</u> = <u>x </u>
1 25
and then you solve for that by cross multiplying and you get 43.3
Answer:
I think the answer is C sorry if I'm wrong but hope I helped
Answer:
y=10x+75
Step-by-step explanation:
Because y-y1 = m(x-x1)
Plug in the y1(5) and x1(-7)
So, y-5 = 10(x+7)
= y=10x+75
