(For 15 points) which expression is equivalent to (3^2)^4•3^4

1foot = 12 inches; 1 yard = 3 feet

Find the number of liters in 12.8 gal of gasoline. round to the nearest hundredths

If 1.4% of the mass of a human body is calcium, how many kilograms of calcium are there in a 165-pound man? 1.0 kg ca 5.1 kg ca 1.0 x 102 kg ca 5.1 x 102 kg ca