Working together, melissa and jing can mow a lawn in 5 hours. it would take melissa 8 hours to do the job alone.

what is the value of r, the part of the lawn that jing could complete in 1 hour?

0.075
0.125
0.375
0.625

Stefano accidentally dropped his sunglasses off the edge of a canyon as he was looking down. the height, h(t), in meters (as it relates to sea level), of the sunglasses after t seconds, is shown in the table. during its descent, the pair of sunglasses passed by a climber in the canyon 6 seconds after stefano dropped them. to the nearest meter, what is difference in elevation between stefano and the climber? 166 meters 176 meters 230 meters 240 meters its b.176 i took the test 166 is wrong and 176 is correct