Answer:
1. He began his ascent up the corporate ladder when he was very young.
2. Since we revised our action response plan, our office is well equipped to handle any emergency.
Explanation:
1. The use of the word "ascent' meaning a climb up, is the right usage and also the spelling is correct.
2. The use of the word "revised" in the sentence is correct, with it being the second form of the verb. Also, its usage in the sentence is also right,
3. Maurice was hired as CFO of a Fortune 500 company before he was even fourty years old.
Here, the use of the word "fourty" is wrong in its spelling. The correct spelling should be "forty".
4. The new electronic devise will keep track of your appointments.
In this sentence, the spelling of the word "devise" is wrong. It should be "device", a noun and not "devise", which is a verb.