Asubmarine descends 60 ft/min. what depth below the water's surface will the submarine reach in 4 min after leaving the surface

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

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

Factor and solve to find roots x squared -x - 90 =0