To calculate how long it will take Diego to type 385 words at a rate of 140 words in 4 minutes, you can set up a proportion:
(140 words / 4 minutes) = (385 words / x minutes)
Now, solve for x:
140/4 = 385/x
35 = 385/x
To isolate x, divide both sides by 35:
x = 385/35
x = 11
So, it will take Diego 11 minutes to type 385 words at his given rate.