A. Write a sinusoidal function that models the tide depth d (in feet) as a function of the time t (in hours). Let t = 0 represent midnight.(Show your work). b. Find all the times when low and high tides occur in a 24-hour period. (use Desmos to Graph your function to help you visualize this situation)

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?

Luisa sells stuffed animals. she sells her stuffed elephant for $34.90, and the sales tax is 6% of the sale price. about how much is the sales tax on the elephant?

The equation line of cd is y=-2x-2. write an equation of a line parallels to line cd in slope-intercept form that contains point (4,5)