In a 100-meter dash, the first 5 racers finished with the following times: 11.6 seconds, 12.8 seconds, 10.8 seconds, 11.8 seconds, and 14 seconds. what is the mode for this set of data?

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?