Answer:
the slope is negative 
Step-by-step explanation:
Simplify by combining z terms first.
-10z = 18
Now divide both sides of the equation by -10, and simplify.
z = -9/5
Answer:
See below in bold.
Step-by-step explanation:
Mean = 150 cm = 150 * 0.033 feet
= 4.95 feet.
The standard deviation = 10 cm = 10 * 0.033
= 0.33 feet.
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