Change 557 779 seconds to days, hours, Minutes and seconds​

Samantha swam upstream for some distance in one hour. she then swam downstream the same river for the same distance in only 12 minutes. if the river flows at 4 mph, how fast can samantha swim in still water?

The quadratic function h(t)=-16.1t^2+150 choose the graph representation

Which of the following three dimensional figures has a circle as it’s base