The height of the tide of the ocean is measured along a cliff. The water level oscillates between 2 feet at low tide and 16 feet at high tide. Low tide
occurs at 8 a. m. and high tide is at 2 p. m. At t = 0, the height of the water is
9 feet. *
-7cos(180t) +9
-7sin(180t) +9
-7cos(90t) + 9
-7sin(90t) +9
Other:

1) you deposit $2,500 in an account that earns 4% simple interest. how much do you earn in eight years?

David estimated he had about 20 fish in his pond. a year later, there were about 1.5 times as many fish. the year after that, the number of fish increased by a factor of 1.5 again. the number of fish is modeled by f(x)=20(1.5)^x. create a question you could ask that could be answered only by graphing or using a logarithm.

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )