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.

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles

$30.32

step-by-step explanation:

65.00*.12=2.80

65.00-2.80=57.20

57.20*1.06=60.632

60.632/2=30.316