Aparticular strain of bacteria triples in population every 45minutes. assuming you start with a 50 bacteria in a petri dish, how many bacteria will there be in 4.5 hours?

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

Tickets to a science exposition cost $5.75 each for studentd and $7.00 for adults.how many students and adults went if the ticket charge was $42.75

If the simple annual interest rate on a loan is 6, what is the interest rate in percentage per month?