Explanation: Although the word "dispose" ends in an "e", <u>the "e" is dropped </u>when the suffix "-able" is added to the root word <u>because the suffix starts with a vowel sound ("a"</u>). Moreover,<u> the "e" is dropped because there is no "c" or "g" in the root</u>. In that way, spelling the word formed with the root "dispose" plus the suffix "-able" as "disposeable" is incorrect: "disposable" is the correct form.