A man is standing on a straight bridge over a river and another man on a boat on the river just below the man on the bridge. If the first man starts walking at the uniform speed of 4m/min
and the boat moves perpendicularly towards the bridge at the speed of

5m/min
, then at what rate are they separating after

4min
, if the height of the bridge above the boat is

3m

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?