325x454= 147550x what equals 150000

Shania's test scores in 8 subjects were 88, 91, 85, 74, 69, 72, 80, and 87. shania found the middle number of her scores. which type of measure did she find?

Find the height of a square pyramid that has the volume of 32 ft.³ and a base lengthof 4 feet

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.