5. At a seaport, the depth of water h metres at time t hours is given by h=4.6 sin 30°(t - 2.7)+7.8. a) Sketch the graph and calculate the depth of the water at 1:45 pm.
b) What is the maximum depth of water and when does it occur?
Any body could help me write the solution please！

Aclass consists of 55% boys and 45% girls. it is observed that 25% of the class are boys and scored an a on the test, and 35% of the class are girls and scored an a on the test. if a student is chosen at random and is found to be a girl, the probability that the student scored an ais

If the cost to mail a package is an initial $5 and $0.28 for every pound the total cost to mail a package was $11.27, how much did the package weigh?

Which of the following could be the ratio of the length of the longer leg 30-60-90 triangle to the length of its hypotenuse? check all that apply. a. 313 6 b. 3: 215 c. 18: 13 d. 1: 13 e. 13: 2 of. 3: 15