Answer:
also double
Step-by-step explanation:
To maintain the same purchasing power, if price doubles, nominal demand for money should double too.
For example, let us assume that the price of an apple is $2 And you purchase 10 apples every week. You pay $20. Price level now rises to $4. To be able to purchase the same quantity of Apples, you need to demand for $40. The nominal demand for money has also doubled.
I hope my answer helps you