Aweightlifter holds a 1,700 n barbell 1 meter above the ground. one end of a 2-meter-long chain hangs from the center of the barbell. the chain has a total weight of 500 n. how much work (in j) is required to lift the barbell to a height of 2 m?

Can any one me with the answers to these questions asap?

Colby and jaquan are growing bacteria in an experiment in a laboratory. colby starts with 50 bacteria in his culture and the number of bacteria doubles every 2 hours. jaquan starts with 80 of a different type of bacteria that doubles every 3 hours. let x equal number of days. colbys experiment follows the model: a.) y=50*2^x b.) y=50*2^8x c.) y=50*2^12x jaquans experiment follows the model: a.)80*2^x b.)80*2^8x c.)80*2^12x

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.