A dolphin was swimming 20 feet below sea level. Then it dove to 45 feet below its original position. Which Integer represents the depth of the dolphin’s dive?
To find the depth of the dolphin's dive, we need to subtract the initial depth from the final depth.
Initial depth: 20 feet below sea level
Final depth: 45 feet below sea level
To calculate the depth of the dive, we subtract the initial depth from the final depth:
Depth of the dive = Final depth - Initial depth
Depth of the dive = 45 feet below sea level - 20 feet below sea level
Depth of the dive = 25 feet below sea level
Therefore, the integer that represents the depth of the dolphin's dive is -25.
To determine the depth of the dolphin's dive, we need to subtract its new position from its original position. The original position is 20 feet below sea level, represented by -20. The dolphin dove further to 45 feet below its original position, so we need to subtract 45 from -20.
To subtract a negative number from another negative number, we can use the rule: "a - (-b) = a + b". This means that subtracting a negative number is the same as adding the positive version of that number.
Using this rule, we can rewrite the subtraction as: -20 - (-45) = -20 + 45.
When we add -20 and 45, we get 25. Therefore, the integer that represents the depth of the dolphin's dive is 25.