Fred has two pens ( red and green). he wants to write the word "yes" and "no" with both pens. in how many ways can he write both words with both pens?

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

The half-life of a certain material is 0.004 second. approximately how much of a 20-gram sample will be left after 0.016 second? a. 5 grams b. 16 grams c. 0.32 gram d. 1.25 grams

The poll report includes a table titled, “americans using cash now versus five years ago, by age.” the age intervals are not equal. why do you think the gallup organization chose the age intervals of 23–34, 35–54, and 55+ to display these results?