Answer:
A. it cost the company $90.00 in electricity
C = 2(PI)r multiply 2 x 3.14 x (whatever the radius is!
The remaining amount after 4 years is 1.25 kg
<h3>How to determine the remaining amount?</h3>
The half life of a function is represented as:

Where
Ao represents the initial amount
So, we have:

In 4 years, t = 4.
So, we have:

This gives

Evaluate the expression
A = 1.25
Hence, the remaining amount after 4 years is 1.25 kg
Read more about half life at:brainly.com/question/26148784
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Answer:
2*6*3= 36
Step-by-step explanation:
hope this helps
Multiply whats inside the prentices first, then multiply on the outside then that's how you will get your answer