The quadrilateral ABCD is a parallelogram.
The value of a is?

An ant travels at a constant rate of 30cm every 2 minutes.at what speed does the ant travel per minute

Ateam of runners is needed to run a 1 2 -mile relay race. if each runner must run 1 4 mile, how many runners will be needed?

From the top of a tree a bird looks down on a field mouse at an angle of depression of 50°. if the field mouse is 40 meters from the base of the tree, find the vertical distance from the ground to the bird's eyes.