Question

The cost to replace a water pump in a sports car was $668. This included $490 for the water pump and $89 per hour for labor. How many hours of labor were required to replace the water pump?

Answer 1

Answer: 2 hours

668 - 490 = 178
89h = 178
—- ——
89 89
h = 2

Answer 2

Let's call the number of hours of labor required to replace the water pump as "x".

The total cost of the water pump and labor was $668, so we can write an equation:

$490 + $89x = $668

Now we can solve for x by subtracting $490 from both sides:

$89x = $668 - $490

$89x = $178

And finally, dividing both sides by $89:

x = $178 / $89

x = 2 hours

So, 2 hours of labor were required to replace the water pump.