A computer purchased for $1,650 loses 19% of its value every year.

The computer's value can be modeled by the function v(t)=aâ‹…b^t, where v is the dollar value and t the number of years since purchase.

(A) In the exponential model a=____ and b=______ .

(B) In how many years will the computer be worth half its original value? Round answer to 1 decimal place.

The answer is_____ years