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Read this word problem.\newlineA guppy was swimming 88 feet below the surface of the river. It swam down 66 more feet to escape a large, hungry fish. What is the position of the guppy now relative to the surface?\newlineTo solve the problem, Jenna subtracted 868 - 6 and came up with an answer of 22 feet. Is Jenna correct? Why or why not?\newlineChoices:\newline(A)Yes, Jenna is correct.\newline(B)No. The answer should have been 2-2 feet, not 22 feet, because the guppy is below the surface.\newline(C)No. Jenna should have subtracted 86-8 - 6 because the guppy started 88 feet below the surface and swam down 66 more feet.

Full solution

Q. Read this word problem.\newlineA guppy was swimming 88 feet below the surface of the river. It swam down 66 more feet to escape a large, hungry fish. What is the position of the guppy now relative to the surface?\newlineTo solve the problem, Jenna subtracted 868 - 6 and came up with an answer of 22 feet. Is Jenna correct? Why or why not?\newlineChoices:\newline(A)Yes, Jenna is correct.\newline(B)No. The answer should have been 2-2 feet, not 22 feet, because the guppy is below the surface.\newline(C)No. Jenna should have subtracted 86-8 - 6 because the guppy started 88 feet below the surface and swam down 66 more feet.
  1. Start at 8-8 feet: The guppy starts 88 feet below the surface, so we start with 8-8 feet.
  2. Swim down 66 feet: The guppy swims down 66 more feet, so we need to add 6-6 feet to the initial 8-8 feet.
  3. Calculate new position: Calculating the new position: 8+(6)=14-8 + (-6) = -14 feet.
  4. Jenna's incorrect calculation: Jenna's calculation of 86=28 - 6 = 2 feet is incorrect because she didn't account for the direction of the guppy's movement, which is further down.

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