What will be the cost price of a television when it is sold at Rs. 30,000 with the profit of 20%.​

Which of the symbols correctly relates the two numbers below check all that apply 6? 6

Isuck at math ; ^; m a student solved this problem and said the answer is 3 feet. chase had a roll of ribbon that contained 7 7/8  feet of ribbon. he cut off one piece that was 3 5/8  feet long and another piece that was 1 1/4  feet from the roll. how much ribbon was left on the roll? is the student's answer reasonable? yes, the answer is reasonable. no, the answer is not reasonable. it should be about 2 feet. no, the answer is not reasonable. it should be about 13 feet. no, the answer is not reasonable. it should be about 4 feet.

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