The value of 'd' would be 80.
Answer:

Step-by-step explanation:
So we have the limit:

Let's remove the fractions in the denominator by multiplying both layers by (6+x)(6). So:

Distribute:

Simplify the numerator:

Both the numerator and the denominator have an x. Cancel:

Direct substitution:

Simplify:

And that's our answer.
And we're done!
10,634.4 total cost
2954t t=3.6h. 2954 x 3.6 = 10,634.4 total cost