The function ƒ(x) = x2 − 9 is not one-to-one. Find a portion of the domain where the function is one-to-one and find an inverse function.

Customers at an ice-cream shop took a survey .the results showed that 144 customers rated the shop as being "very satisfactory ."this number represented 45%of the total nunber of customers who took the survey

An episode of a television show is 60 minutes long when it originally airs with commercials. on a dvd without commercials, the episode is only 417 minutes long. how many1-minute commercials did the episode include when it originally aired? write and solve an equation to justify your answer.

What is sin 7x/4 ? i need on this urgent trig