# A scuba diver used the expression below to describe his position in relation to sea level.

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## Question:

A scuba diver used the expression below to describe his position in relation to sea level.

2 + (–20) + 8
Which statement could describe the diver’s movements?
a.Starting on a platform 2 feet above sea level, dive down to a location that is 18
feet below sea level, and then rise 8 feet.
b.Starting on a platform 2 feet above sea level, dive down to a location that is 20 feet below sea level, and then rise 8 feet.
c.Starting 2 feet below sea level, dive down 20 more feet, and then rise to a location that is 8 feet below sea level.
d.Starting 2 feet below sea level, dive down 18 more feet, and then rise to a location that is 8 feet below sea level.

a.Starting on a platform 2 feet above sea level, dive down to a location that is 18  feet below sea level, and then rise 8 feet.

Step-by-step explanation:

The first number (2) is positive and represents the height above the sea level that the scuba diver started. So, options c) and d) are incorrect.

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If the (-20) represent
s the position (-20) feet below the sea, as stated in option b), then, the position (+8) will represent that the scuba diver will be 8 feet above the sea level in the next position, which has no sense.

Therefore, option a) is the correct one.

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