Write 0.8 as a fraction. a)29 b)49 c)79 d)89

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

Jack lives on a farm and has a large backyard. the area of his rectangular backyard is of a square mile. if the width of the yard is of a mile, what fraction of a mile is the length of the rectangular backyard?

When turned about its axis of rotation, which shape could have created this three-dimensional object?