bobby is diving 50 feet below sea level at the beach. his sister is at the swimming pool deck, which is 15 feet above sea level. what is the difference, in feet, between the pool deck and bobby's position?
To find the difference in feet between the pool deck and Bobby's position, you need to subtract the two values. Bobby is 50 feet below sea level, so his position can be represented as -50 feet. The pool deck is 15 feet above sea level, so its position can be represented as +15 feet.
Now, to find the difference, you subtract Bobby's position from the pool deck's position:
15 feet - (-50 feet)
To simplify the subtraction, you can rewrite it as an addition by changing the sign of the second term:
15 feet + 50 feet
Adding the two values, you get:
= 65 feet
So, the difference between the pool deck and Bobby's position is 65 feet.