C=16h
C, the total cost is equal to 16 dollars per hour, h
We can set it up like this:

Multiply straight...

Simplify...

That's our answer, we can also convert it to decimal.
Answer in fraction form:

Answer in decimal form:

Let me know if you have any questions regarding this problem!
Thanks!
-TetraFish
24 (you new amount) - 11 (new cards) = 13 cards to begin with
Answer:
3.5
Step-by-step explanation:
The answer to number four is 90,000.
hope this helps!
-SummerBreaker ;)