A pedestrian is walking at a speed of 3km/h. Express the distance in kilometers, d, as a function of time in hours, t

Explanation:

I'm using the formula

d = rt

where

Afterward, I replaced r with 3 to represent the 3 km/hr speed.

So that's how we go from d = rt to d = 3t

If for example, they traveled for t = 2 hours, then d = 3t = 3*2 = 6 km is the distance they walk.

d = (3 km/hr)t

Step-by-step explanation:

Recall that distance = rate times time.

Here, distance = (3 km/hr)(time), or d = (3 km/hr)t, where t:  number of hours

$4034.40

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40

38 was the other number of your question.