The density of an object with a volume of 60.oml and a mass of 400.0g is
a. 0.150 g/ml
b. 2.89 g/ml
c. 5.50 g/ml
d. 6.67 g/ml

the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.