I need help on these questions for my studies. Would be greatly appreciated. Thanks.

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

What is the range? can’t seem to find it out

Taber invested money in an account where interest is compounded every year.he made no withdrawals or deposits. the function a(t)=525(1+0.05)^t represent the amount of money in the account after t years. how much money did taber origanally invested?