Question 25 *
On Monday, Lisa's fish bowl contained 1 litre of water. On Friday, the fish bowl
contained 0.75 litre of water. By what percentage did the amount of water in Lisa's fish
bowl decrease?
А.
в.
С.
D.
0.25%
0.75%
25%
759%

The jewelry store is having a sale. necklaces that were regularly priced at $23.50 are on sale for $18.80. what is the percentage of decrease in the price of necklaces?

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?

Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .