Answer:

Step-by-step explanation:
Given:


Required
The explicit formula
Let n = 2; So, we have:





So, we have:
----- First term

Calculate common difference (d)



The explicit function is then calculated as:

Where
--- First term
So:


Open bracket

Collect like terms


Answer:
c
Step-by-step explanation:
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➷ Simply divide the two values:
3/(3/8) = 8
You can make 8 burgers.
➶ Hope This Helps You!
➶ Good Luck (:
➶ Have A Great Day ^-^
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Answer:
7/10 pi (radians)
Step-by-step explanation:
The formula for sector area is (angle * r^2)/2
140pi = angle*r^2/2
multiply both sides by 2
280pi = angle * r^2
r = 20 cm (substitute)
280pi = angle * (20)^2
280pi = angle * 400
Divide both sides by 400
7/10 pi = angle