A duck weighs​ 3 1/2 ​pounds. How many ounces does the duck weigh?

14 oz
28 oz
56 oz
112 oz

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

Me, prove a quadrilateral with vertices g(1,-1), h(5,1), i(4,3) and j(0,1) is a rectangle using the parallelogram method and a rectangle method.

Rena is building a 1: 180 scale model of a real castle. her model has a rectangular base that is 3 feet wide and 4 feet long what is the area of the base of the actual castle in square feet