Answer:
Step-by-step explanation:
Hello, this is a geometric sequence so we are looking for a multiplicative factor.

So, the explicit formula is for n

Hope this helps.
Do not hesitate if you need further explanation.
Thank you
First, multiply the radius by itself. 5x5=25. Then multiply by pi, or 3.14. 25x3.14=78.5. The area of the circle is 78.5units^2. Hope this helps! ;)
You'd pay $77.80 for 20 gallons
Answer:
Step-by-step explanation:
simplifies if you divide by .5 to 
Your answer is A. 0.3 Hope this Helps.