Question

diego can type 140 words in 4 minutes.
a. at this rate, how long will it take him to type 385 words?
\boxed{minutes}
b. how many words can he type in 15 minutes?
\boxed{words}

Explanation:

Step1: Find typing rate

Diego types 140 words in 4 minutes. Rate = words / time = \( \frac{140}{4} = 35 \) words per minute.

Step2: Solve part a (time for 385 words)

Time = words / rate = \( \frac{385}{35} = 11 \) minutes.

Step3: Solve part b (words in 15 minutes)

Words = rate × time = \( 35 \times 15 = 525 \) words.

Answer:

a. 11 minutes
b. 525 words