The correct Option is A. $6.80
Explanation:
For first 16 kWh => $2
For next (80 - 16 = 64 kWh) => 64 * $0.075 = $4.8
Add both of them:
$2 + $4.8 = $6.80 (Option A)
Step-by-step explanation:
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When applied to each other they are dependent
there's nothing in your screen
Answer:

Step-by-step explanation:
Given


Required
Find p, when 
We have:

Express as equation

Make k the subject

When: 


When
, we have:



