Whenever the questions asks for the probability and has "or" you have to add the two probabilities. In the same way, "and" implies multiplication. Therefore, the probability that someone swims is:

Probability that someone runs:

Thus, if you add them:

So, the probability that someone swims <em>or</em> runs is
1/2 or
50%.
The area of one of the triangular lateral faces is

You're told that the slant height, which is the same as the height of the triangular face, is 9.8, so you have

where

is the length of the base of the triangle, which is also the same as the side length of the base of the pyramid. So
Answer:11/4
Step-by-step explanation: u have to just put it backwards