People who good at Math please contact me on Instagram I got a test tomorrow and I need help!

Here’s my account cehrro

I would appreciate if you help me guys!

Topic that I got test on math is : trigonometry...

Ihonestly don’t understand this at all

Asphere has a diameter of 10 in. what is the volume of the sphere?

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