The formula s = 3.1 Vd can be used to find the depth (d) of the water, in meters, if
the speed (s) of a tsunami, in meters per second, is known.
If the speed of a tsunami is 310 meters per second, the depth of the water is
meters.
The solution is

The pie is multyplued by the second step

Look, when you want to do something like put it like x^2. x2 could mean x² or x₂. so to clear confusion, know the notation. to find the product multiply the x's and you get -8x and the y's and you get 6y. since it's all being multiplied it is just -8x6y, or answer a. although the better answer is -48xy(combining -8 and 6) because you should multiply constants whenever you can.