What is 3 1/4 as a decimal or whole number ? (Not 31/4 I meaning 3 1/4)

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

How many roots does the graphed polynomial function have? 1-02

How do you find p(a and b) if a and b are independent events for two or more actions, such as tossing a coin twice and finding p(heads and heads)? 2. how do you find p(a or b) if a and b are independent events for one action, such as spinning a four-color spinner once and finding p(red or blue)?