Answer:
-1
Step-by-step explanation:
took the exam on edge
The random variable X is normally distributed with mean μ=30 and standard deviation σ =10.
Use the transformation 
for calculating the probability. This value is called Z-score.
The Z score is 
.
Refer to the standard normal distribution table.
The probability
R could be anything. But when you multiply it with 6 it should give you a result of a number less than 3.
Example: if r=0.1, 0.1x6=0.6 which is less than or equal to 3.
The greatest number r can be is 1/2
Area:66 Perimeter:36
Step-by-step explanation:
Perimeter: 9+9+5+3+4+6: 36
as 9-5 is 3
and 9-3 is 6
Area: 9*6 +3*4: 66
