Two students finish a conversation and walk away from each other in perpendicular directions. If one person walks at 4 ft/sec and the other at 3 ft/sec, how fast is the distance between the two changing at time t = 10 sec?

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

c.

step-by-step explanation:

you would need to know all the numbers that are on there

step-by-step explanation:

you'll just earn points here

step-by-step explanation: