Printable View

Can someone help me solve for t. Thanks! (.5)^-(t)/(4.5*10^9) * 100 = 80

Hello jsu03 Quote: Originally Posted by jsu03 Can someone help me solve for t. Thanks! (.5)^-(t)/(4.5*10^9) * 100 = 80 I take it that the equation is: So divide both sides by : Take logs (to base ) of both sides: Grandad