Math Practice 101
Homework Explained - Math Practice 101

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Grade 8 HMH Go Math - Answer Keys
Chapter 2:Exponents and Scientific Notation; Lesson 4: Operations with Scientific Notation


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  Independent Practice  

  • Question 16 (request help)

    An adult blue whale can eat \(4.0 \times 10^ 7 \) krill in a day. At that rate, how many krill can an adult blue whale eat in \(3.65 \times 10^ 2\) days?
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  • Question 17 (request help)

    A newborn baby has about 26,000,000,000 cells. An adult has about \(4.94 \times 10 ^{13}\) cells. How many times as many cells does an adult have than a newborn? Write your answer in scientific notation.
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Represent Real-World Problems

The table shows the number of tons of waste generated and recovered (recycled) in 2010.

  • Question 18 (request help)

    What is the total amount of paper, glass, and plastic waste generated?
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  • Question 19 (request help)

    What is the total amount of paper, glass, and plastic waste recovered?
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  • Question 20 (request help)

    What is the total amount of paper, glass, and plastic waste not recovered?
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  • Question 21 (request help)

    Which type of waste has the lowest recovery ratio?
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Social Studies

The table shows the approximate populations of three countries.

  • Question 22 (request help)

    How many more people live in France than in Australia?
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  • Question 23 (request help)

    The area of Australia is \(2.95 \times 10^ 6\) square miles. What is the approximate average number of people per square mile in Australia?
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  • Question 24 (request help)

    How many times greater is the population of China than the population of France? Write your answer in standard notation.
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  • Question 25 (request help)

    Mia is \(7.01568 \times 10^ 6\) minutes old. Convert her age to more appropriate units using years, months, and days. Assume each month to have 30.5 days.
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