Một tàu thủy chạy trên khúc sông 80 km, cả đi lẫn về mất 8 giờ 20 phút. Tính vận tốc của tàu thủy khi nước yên lặng, vận tốc dòng nước là 4 km/h

The chs baseball team was on the field and the batter popped the ball up. the equation b(t)=80t-16•16+3.5 represents the height of the ball above the ground in feet as a function of time in seconds. how long will the catcher have to get in position to catch the ball before it hits the ground? round to the nearest second

What is the slope of the line that contains the points (-2,1) and (0,-3)

Mr.zimmerman invested $25,000 in an account that draws 1.4 interest, compouneded annually. what is the total value of the account after 15 years