Ana can finish a certain job in 10 hours. together, ana and nina can finish the same job in 3 hours. how many hours can nina finish the job alone?

An objects motion is described by the equation d= 4sin (pi t) what will the height of the object be at 1.75 seconds?

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.

Kristen is wrapping presents for the holidays. she has a box that measures 4 ft. x 2 ft. x 2 ft. how many square feet of wrapping paper does she need to cover the box without overlapping?