In each of Exercises, assume that the variable under consideration has a density curve. Note that the answers required here may be only approximately correct. The area under the density curve that...

In each of Exercises, assume that the variable under consideration has a density curve. Note that the answers required here may be only approximately correct.

The area under the density curve that lies to the left of 10 is 0.654. What percentage of all possible observations of the variable are

a. less than 10?
b. at least 10?