What is the first speed at which the ratio of stopping distance to speed is greater than 3 to 1

50 mph
40 mph
20 mph

  40 mph

Step-by-step explanation:

3 times the speed in mph will be ...

  3 × 20 = 60 . . . . . more than 43

  3 × 40 = 120 . . . . less than 126

The stopping distance in feet is more than 3 times the speed in mph for a speed of 40 mph.

The answer will depend on the units of the ratio. Here, we are apparently to use units of feet per (mile per hour), that is, (ft·h/mi). The answer would be different for distance in meters and speed in km/h, for example.

wholesale price is the initial price before markup. retail price comes after the markup.

a price of 8 bucks that's marked up by 100%   is

formula: initial price + (percent markup in fraction/decimal)(initial price)

8+(1)(8)

8+8

16

retail price is $16.