Integer word problems

In Buffalo, New York, the temperature was -14°F in the morning. If the temperature dropped 7°F, what is the temperature now?

• -7°F
• -21°F
• 7°F
• 21°F

A submarine was situated 800 feet below sea level. If it ascends 350 feet, what is its new position?

• 450
• -450
• 1150
• -1150

From 10 meters below sea level, Derek took off in his helicopter and ascended 100 meters. Which integer represents Derek's elevation now?

• -90
• 90
• 110
• -110

At sunrise, the outside temperature was 1° below zero. By lunch time, the temperature rose by 17° and then fell by 4° by night. What was the temperature at the end of the day? 

• 14°
• 13°
• 12°
• 11°

Mr. Oles has a bank balance of -42 dollars at the start of the month. After he deposits 6 dollars, what is the new balance? 

• -48 dollars
• -36 dollars
• -34 dollars
• 7 dollars