Agallon of gasoline contains about 36 kilowatt hours of energy. a gallon of gas cost $2.50. a kilowatt hour of electricity costs 8 cents. which form of energy is less expensive?

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

The perimeter of a rectangular lot of land is 436 ft. this includes an easement of x feet of uniform width inside the lot on which no building can be done. if the buildable area is 122 ft by 60 ft, determine the width of the easement. select one: a. 9 feet b. 18 feet c. 4.5 feet d. 7 feet

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of