4.1: A dolphin travels at an average of 10 mi/h in still water. The dolphin travels 75 miles downstream with the east coast current and 75 miles upstream against
the east coast current in a total of 18 hours. What is the average speed of the
current in this section of the Atlantic Ocean? Round to the nearest tenth.
Your answer

see attached

step-by-step explanation:

given the function as;

write the equation replacing f(x) with y

form   and fill a table containing values of y with corresponding values of x

you can take a range for   values of x as -3≤x≤3

solving for x=-3

for x=-2

repeat the same procedure to get the values of y for the remaining ,x=-1 to x=3

plot the values of y against values   of x and obtain the following graph

0.0076, if you meant 4.125 divided by 0.03125 it would be 132

step-by-step explanation:

first you have to move the decimal in 0.03125 over until its behind the 5 which is 5 places over. now the number is 3125

then you have to move the decimal in 4.125, 5 places over. now the number is 4,112,500.

now you divide like you would normally would and get 0.0076

3.07*10^-4

move the decimal 4 places to the left

.000307