What is 1/6 + 1/6 + 1/6

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?

Brainlest answer can you find the area and circumference of a circle given the radius or diameter? if its yes or no explain why

This summer the number of tourists in salem increased 4.5% from last years total of 426000. how many more tourists came to salem this summer