Will give brainliest! if right!
jeff has to write a report on two of the seven wonders of the ancient world. how many different combinations of two reports can jeff write?

a 14
b 21
c 28
d 49

How do the definitions, properties, and postulates you've learned about line segments, parallel lines, and angles to define the shapes of polygons

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2

What is the value of f(x) = 2.2 for f(-2)?