what is as big as an elephant but does not weigh as much as an elephant ill give a brainiest to the first correct answer

Players on the school soccer team are selling candles to raise money for an upcoming trip. each player has 24 candles to sell. if a player sells 4 candles a profit of$30 is made. if he sells 12 candles a profit of $70 is made

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

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog