Solve the following word problem. 11. A playground measuring 19.6 meters by 15.1 meters needs new wood chips.
a) Estimate the area of the playground.

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

The graph shows the distance y, in inches, a pendulum moves to the right (positive displacement) and to the left (negative displacement), for a given number of seconds x. how many seconds are required for the pendulum to move from its resting position and return? enter your answer in the box.

How to do this , and can some one explain