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q: in 2013 , the united states postal service charged $0.46 to mail a letter weighing up to 1 oz. and $0.20 per ounce for each additional ounce. which function would determine the cost, in dollars, c(z), of mailing a letter weighing x ounces where z is an integer greater than 1 ?

possible answers: a. c(z) = 0.46 + 0.20, b. c(z) = 0.20z + 0.46, c. c(z) = 0.46( z - 1 ) + 0.20, d. c(z) = 0.20 (z - 1 ) +0.46

For a field trip to the zoo, 4 students rode in cars and the rest filled nine busess. how many students were in each bus if 472 students were on the trip

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.

In one day there are too high tides into low tides and equally spaced intervals the high tide is observed to be 6 feet above the average sea level after six hours passed a low tide occurs at 6 feet below the average sea level in this task you will model this occurrence using a trigonometric function by using x as a measurement of time assume the first high tide occurs at x=0. a. what are the independent and dependent variables? b. determine these key features of the function that models the tide: 1.amplitude 2.period 3.frequency 4.midline 5.vertical shift 6.phase shift c. create a trigonometric function that models the ocean tide for a period of 12 hours. d.what is the height of the tide after 93 hours?