Find the area of a regular octagon with side length 4 cm.

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

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

Including 6% sales tax, an inn charges $135.68 per night. find the inns nightly cost