Tide 2: Suppose that you are on the beach at Port Aransas, Texas, on August At 2:00 p.m., at high tide, you find that the depth of the water at the end of a pier is 1.5 m. At 7:30 p.m., at low tide, the depth of the water is 1.1 m deep. Assume that the depth varies sinusoidally with time. a. Find a particular equation for depth as a function of time that has elapsed since 12:00 midnight at the beginning of August b. Use your mathematical model to predict the depth of the water at 5:00 p.m. on August c. At what time does the first low tide occur on August 3? d. What is the earliest time on August 3 that the water will be 1.27 m deep? e. A high tide occurs because the Moon is pulling the water away from Earth slightly, making the water a bit deeper at a given point. How do you explain the fact that there are two high tides each day at most places on Earth? Provide the source for your information.

Koshar Amy Brogan March 6 & 8, 2016 Week 13 Cryptography Part 2 Review Shift Cipher o A code that replaces letters with other letters Code the message “Send Ammo” using the Vignere key “SHOE” (18-7-14-4) S E N D A M M O 18 4 13 3 0 12 12 14 S H O E S H O E 18 7 14 4 18 7 14 4 36 11