Homework Explained - Math Practice 101

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Grade 8 HMH Go Math - Answer Keys
Chapter 2:Exponents and Scientific Notation; Lesson 2: Scientific Notation with Positive Powers of 10


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  Independent Practice  

Paleontology 

Use the table for problems 16–21. Write the estimated weight of each dinosaur in scientific notation.

  • Question 22 (request help)

    A single little brown bat can eat up to 1,000 mosquitoes in a single hour. Express in scientific notation how many mosquitoes a little brown bat might eat in 10.5 hours.

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  • Question 23 (request help)

    Multistep

    Samuel can type nearly 40 words per minute. Use this information to find the number of hours it would take him to type \( 2.6 \times 10 ^5\) words.

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  • Question 24 (request help)

    Entomology

    A tropical species of mite named Archegozetes longisetosus is the record holder for the strongest insect in the world. It can lift up to \(1.182\times10^3\) times its own weight.

    a. If you were as strong as this insect, explain how you could find how many pounds you could lift.

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  • Question 24 (request help)

    b. Complete the calculation to find how much you could lift, in pounds, if you were as strong as an Archegozetes longisetosus mite. Express your answer in both scientific notation and standard notation.

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  • Question 25 (request help)

    During a discussion in science class, Sharon learns that at birth an elephant weighs around 230 pounds. In four herds of elephants tracked by conservationists, about 20 calves were born during the summer. In scientific notation, express approximately how much the calves weighed all together.

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  • Question 26 (request help)

    Classifying Numbers

    Which of the following numbers are written in scientific notation?

    \(0.641 \times 10^ 3 \)                  \( 9.999 \times 10^ 4\)
    \(2 \times 10^ 1\)                          \( 4.38 \times 5^{10}\)

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