Afarmer owns pigs, chickens, and ducks. when all her animals are together, she has 30 feathered animals, and the animals all together have a total of 120 legs and 90 eyes. (all the animals have the expected number of parts.) how many of each animal might she have?

How many zeros does the function f(x)=4x3-x2+1 have

An airplane consumes fuel at a constant rate while flying through clear skies, and it consumes fuel at a rate of 64 gallons per minute while flying through rain clouds. let c represent the number of minutes the plane can fly through clear skies and r represent the number of minutes the plane can fly through rain clouds without consuming all of its fuel. 56c+64r < 900056c+64r< 9000 according to the inequality, at what rate does the airplane consume fuel while flying through clear skies, and how much fuel does it have before takeoff? the airplane consumes fuel at a rate of gallons per minute while flying through clear skies, and it has gallons of fuel before takeoff. does the airplane have enough fuel to fly for 60 minutes through clear skies and 90 minutes through rain clouds?

What is the number 321,000,000 in scientific notation? also what is the number? ?