Devon makes 12 muffins for a bake sale. He makes 1/4 of all the muffins at the sale. How many muffins are at the bake sale in all?

!! 10 ! a westbound jet leaves central airport traveling 635 miles per hour. at the same time, an eastbound plane departs at 325 miles per hour. in how many hours will the planes be 1900 miles apart?

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days

∆red ≅ ∆ by rule will give brainiest if possible