On a word processing test, iko typed 694 words in 15 minutes. on that same test six days later, iko typed 753 words in 15 minutes. by how many words did iko’s speed improve from the first test to the second test?

The improve in speed is 3.9334 words/min

Step-by-step explanation:

we will find speed at both occasions  and then we can subtract them

First test:

total number of word =694

total time =15 min

we know that

speed = (total number of words)/( total time)

now, we can plug values

speed is

word/min

word/min

Second test:

total number of word =753

total time =15 min

we know that

speed = (total number of words)/( total time)

now, we can plug values

speed is

word/min

word/min

So, improve in speed is

word/min

correct answer:

i^31 = -i