Answer:
0.7102
0.8943
0.3696
Step - by - Step Explanation :
A.) Between $1320 and $970
P(Z < 1300) - P(Z < 970)
find the Zscore of each scores and their corresponding probability uinag the standard distribution table :
P(Z < (x - μ) /σ) - P(Z < (x - μ) / σ))
P(Z < (1320 - 1250) /120) - P(Z < (970 - 1250) / 120))
P(Z < 0.5833) - P(Z < - 2.333)
0.7200 - 0.0098 = 0.7102 (Standard
=0.7102
B.)Under 1400
x = 1400
P(Z < 400)
P(Z < (x - μ) /σ)
P(Z < (1400 - 1250) /120)
P(Z < 1.25) = 0.8943
C.) Over 1290
P(Z > 1290)
P(Z < (x - μ) /σ)
P(Z > (1290 - 1250) /120 = 0.3333
P(Z > z) = 1 - P(Z < 0.3333) = P(Z < 0.3333) = 0.6304
P(Z > 0.3333) = 1 - 0.6304 = 0.3696
The answer to this is 8 1/2.
Answer:
My bad dint mean to answer :/
Step-by-step explanation:
Answer:
5/3
Step-by-step explanation:
An improper fraction is a fraction, not in mixed form, where the numerator (top half) is greater than the denominator (bottom half). Since this fraction is 1 2/3, we already have 1 full and 2/3 full. So, since the 1 is full, it means that in fraction form it equals 3/3.
We can finally add the fractions. 
.
Answer:
-45
Step-by-step explanation:
8 - 8 / 2 + 7^2
PEMDAS Parenthesis Exponents Multiplication Division Addition Subtraction
Exponents 7^2 = 49
8 - 8 / 2 + 49
Division 8 / 2 = 4
8 - 4 + 49
Addition 4 + 49 = 53
8 - 53
Subtraction 8 - 53 = -45
-45
