Help me out please??

Can someone me my sister? she is in third grade. 50 points and brainlist! ones that are not answered. plz and thx!

You are making a blueprint of your bedroom and you plan to use a scale factor of 18 . the actual width of your room is 14 feet and the actual length of your room is 16 feet. determine the width and length of your room on the blueprint. on the blueprint, your room will have a width of feet and a length of feet.

How many $20 bills do you need to have to make $280