What must you do to calculate a meaningful value of distance from the following equation?
d= (0.90km) + (12.5km)/h x (31.5s)
-convert the kilometers to meters.
-convert the kilometers to miles.
-drop the symbols for the units.
-convert all the times to either hours or seconds.

Convert all the times to either hours or seconds

Explanation:

One time unit is in hours, and the other is in seconds.  In order to do the math, the units need to be the same.  So you either need to convert hours to seconds, or seconds to hours.

the independent variable, the one that is intentionally manipulated, is whether or not the car hits the barrier.

the dependent variable, the one that you measure the response in, is the distance that the washers travel.

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

hope this !