-1 (-12 - 9i) + 4i (-12 - 9i)
= 12 + 9i + -48i + 9i^2
= 9i^2 + 39i + 12
Answer:
Step-by-step explanation:
area = length of the base x height
height = 9cm
length of the base = 11cm
area = 9 X 11
area = 99
Answer:
468.75 / 125 = $3.75 per car wash.
Step-by-step explanation:
32 Just add all the numbers up and divide by how many numbers there are (9).
Answer:
z-score = 1
Step-by-step explanation:
Given
Mean= μ=240
SD= σ=32
In order to find the z-score of a value, the mean is subtracted from the value and then divided by standard deviation.
The formula for z-score is:
z-score=(x-μ)/σ
Here x is the value whose z-score is to be found.
In the given question, x = 272
So,
z-score=(272-240)/32
=32/32
=1
So , the z-score for 272 is 1..
