Math Practice 101
Homework Explained - Math Practice 101

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Grade 8 McGraw Hill Glencoe - Answer Keys
Chapter 1 - Real Numbers; Lesson 7: Compute with Scientific Notation


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  • Question 12 (request help)

    Persevere with Problems Central Park in New York City is rectangular in shape and measures approximately \(1.37\times10^{4}\) feet by \(2.64\times10^{2}\) feet. If one acre is equal to \(4.356\times10^{4}\) square feet, how many acres does Central Park cover? Round to the nearest hundredth.
  •    acres

  H.O.T. Problems Higher Order Thinking  

  • Question 13 (request help)

    Find the Error Enrique is finding \(\cfrac{6.63\times10^{-6}}{5.1\times10^{-3}}\). Circle his mistake and correct it.
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  • Question 14 (request help)

    Which one Doesn't Belong? Identify the expression that does not belong with the other three. Explain your reasoning.
    • \(14.28\times10^{9}\)
    • \((3.4\times10^{6})(4.2\times10^{3})\)
    • \(1.4\times10^{9}\)
    • \((3.4)(4.2)\times10^{(6 + 3)}\)
  • Question 15 (request help)

    Persevere with Problems A googol is the number 1 followed by 100 zeros.

    a. What is one googol written in scientific notation?
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  • Question 15 (request help)

    b. How many times greater is a googol of meters than a nanometer?
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  • Question 15 (request help)

    c. There are \(2.5\times10^{10}\) red blood cells in the average adult. About how many adults would it take to have a total of 1 googol red blood cells?
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  • Question 16 (request help)

    Model with Mathematics Write an addition expression and a subtraction expression, each with a value of \(2.4\times10^{3}\).
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