What is the diameter of a 2m circle?

Can (2,3 and square root 10) be sides ona right triangle?

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.

Need plz been trying to do it for a long time and still haven’t succeeded