3 and 2/3 hours.
Multiply the number of hours Dominic spent by the scale factor.
If it was one year it would be 2200 and you just keep adding 200 for each year.
You can't solve this unless you have numbers to substitute or another equation.
<span>a^3 - b^3 = (a - b) </span><span>(<span>a^2 + </span>ab + b^2)
</span><span>so
x^3 - 4^3 = (x - 4)(x^2 + 4x + 16)
hope it helps</span>
