Wei is standing in wavy water and notices the depth of the waves varies in a periodic way that can be

modeled by a trigonometric function. he starts a stopwatch to time the waves.

after 1.1 seconds, and then again every 3 seconds, the water just touches his knees. between peaks, the

water recedes to his ankles. wei's ankles are 12 cm off the ocean floor, and his knees are 55 cm off the

ocean floor.

find the formula of the trigonometric function that models the depth d of the water t seconds after wei

starts the stopwatch. define the function using radians.

On the way home from visiting his family, vincent’s plane cruised at an altitude of 3.2 × 10^4 feet. he had heard that a man named felix baumgartner skydived from an altitude of 1.28 × 10^5 feet. vincent wants to know how much higher felix went on his skydiving trip. question 1 you have already seen how adding numbers works in either scientific notation or standard notation. but can you subtract numbers in scientific notation and get the same results as subtracting in standard notation? to find out, first solve vincent’s problem in standard notation. part a write the cruising altitude of vincent’s plane in standard notation.