0.3 x 103 = 30.9
0.3 x 1025 = 307.5
3 x 10^5 = 300,000
This would convert to 22,200 words an hour.
Try proportions. It can help since it's asking for the "cost". Hope this helps! :)
Answer:

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

And we want to solve for x. In other words, we want to isolate the x-variable.
So, add 2y to both sides of the equation.

On the left, the 2y cancel. Simplify the right:

And we're done!