How do you convert 0.4 repeating into a fraction?

Evaluate cos2θ for cosθ = square root of 3/2

You have a square piece of cardboard that measures 14 inches on each side. to build a box, you cut congruent squares out of each corner of the cardboard. use the picture to find the area of the cardboard you were used to build the box

The functions below show the amount of money bella and sweet t had saved after earning money for doing chores. which description best compares the two functions?