Final answer:
The price for paper shredders when x is 150 is calculated using the price demand function P=300-(x/30), resulting in a price of $295.
Step-by-step explanation:
When substituting x=150 into the price demand function P=300-rac{x}{30}, we can calculate the price for paper shredders. The calculation is as follows:
P = 300 - rac{150}{30}
P = 300 - 5
P = $295
Therefore, the price when x equals 150 is $295, which is option (a).