A baseball diamond is a square with side 90 feet. A batter hits the ball and runs toward first base with a speed of 21 ft/s. (a) At what rate (in ft/s) is his distance from second base decreasing when he is halfway to first base? (Round your answer to one decimal place.)
(b) At what rate (in ft/s) is his distance from third base increasing at the same moment? (Round your answer to one decimal place.)

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.a city water tank holds 20 gallons of water. a technician empties 25% of the tank. how many more gallons of water must be removed from thetank so that it has 5 of the water that it started with: the technician must removemore gallons of water for the tank to have 5 of the water that it started with.