4. Ric takes underwater photographs at a depth of 16 metres below the surface. He signals to Steven when he starts his descent to 100 metres below the surface. Steven expects Ric to signal him when he gets to the new depth. Ric descends at a rate of 12 metres per minute. How many minutes does Steven wait before he gets a signal from Ric?

If \( 3^2 \) is calculated, what is the result?

Reed buys a phone card for \( \$ 25 \) to make job application calls. Card calls cost 7 cents per minute within the area and 10 cents per minute outside the area. Reed makes two hours of calls within the area and one hour of calls outside the area. The rest of his calls are outside the area. How many minutes does he have left on his card for outside calls? swer:

2. Ila-Mae loses her customer service job. Her pay was \( \$ 120 \) per week. She likes to write, so she enters a writing competition. The entry fee is \( \$ 20 \). The prize for a short piece of fiction is \( \$ 2,000 \). She takes eight weeks to write a piece of short fiction, and wins. How does her weekly rate as a writer compare to her previous pay rate?

Arrange the following in decending order. \( 0.78, \frac{4}{5} \) 0.5

28 ones +28 tenths +28 hundredths \( = \)