A possible answer is

.
Pi is an irrational number and when you multiply a rational number with an irrational number, you end up with an irrational number.
Answer:
46,100
Step-by-step explanation:
Non linear means not a straight line so answer C or the third answer.
Answer:
For
it will be plus or minus 
For
it will be plus or minus 
Step-by-step explanation:
Well for
it will be 5i
Because i = -1
If the top is $48 and it is 60% off you will multiply the cost by the decimal form of the sale percentage: 48*0.60= $28.80. This is the amount she will save and I think is the answer you are looking for.
If there is a follow up question asking for the final cost of the top you would find that by subtracting the amount saved from the original cost: 48.00-28.80=$19.20.