THINKING: amp
1. The average depth of water at the end of a dock is 6 feet. This varies 2 feet in both directions with the tide.
Suppose there is a high tide at 12 AM and the tide goes from low to high every 6 hours.
a starting point
a) Write a an equation for function d(t) describing the depth of the water as a function of time with t = 0
corresponding to 12 AM and provide a sketch of the graph of d(t).
ral

step-by-step explanation:

always plug in x. in this case, x equals 4.

i'm going to first solve 4(2+3x)

1) 4(2+3(4)) use pemdas to solve.

i'm going to multiply whats in the parenthesis first, so 3 times 4=12.

2)4 (2+12) i'm then going to multiply 4 by both numbers in the parenthesis (because multiplying comes before adding)

4 times 2= 8.   4 times 12= 48

4) (8+48)= 56 (answer)

i'm then going to solve 8+12x and plug in 4 for x.

1) 8 +12(4)

multiplying comes before adding, so i'm gonna multiply 12 and 4.

12 times 4= 48.

2) 8+48=56

both equal the same!

56

step-by-step explanation: