Final answer:
To find w(3.5) for the function w(x)=75x, you multiply 75 by 3.5, which results in Amelia typing 262.5 words in 3.5 minutes.
Step-by-step explanation:
The function w(x)=75x represents the number of words w that Amelia can type in x minutes. To find w(3.5), we substitute x with 3.5:
w(3.5) = 75 × 3.5
Multiply 75 by 3.5 to obtain the number of words:
w(3.5) = 262.5
Therefore, Amelia can type 262.5 words in 3.5 minutes.