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Math Help - 4 Math Questions

  1. #1
    Junior Member
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    4 Math Questions

    5. Last year Manny Kows bought 3 steers for 74 cents a pound, their total weight was 1,410 pounds. This year he sold these same steers for 65 cents a pound, their total weight was 3,465 pounds. What information do you need to look at to determine how many total pounds was gained?

    A. 3 steers, 74 cents per pound, and 65 cents per pound
    B. 1,410 pounds and 3,465 pounds
    C. 74 cents per pound and 65 cents per pound
    D. 1,410 pounds, 3,465 pounds, 74 cents per pound, and 65 cents per pound

    8. Maria is making a quilt. She has a large piece of fabric that is 0.03 millimeters thick. The fabric is cut in half and one piece is placed on top of the other to make a pile. This pile is cut in half, and one half is placed on top of the other to make an even higher pile. Continuing this process, what would the thickness of the pile be after the 4th cut and piling?

    A. 0.0012 millimeters
    B. 0.06 millimeters
    C. 0.48 millimeters
    D. 24 millimeters

    10. Ole MacDonald has a farm lot that is shaped like a rectangle and is 40 feet wide and 50 feet long. He wants to put a fence around three sides of the lot: both widths and one length. If the posts are to be 10 feet apart, how many posts does he need?

    A. 14
    B. 13
    C. 11
    D. 15

    11. Which of the following statements about rectangles is NOT true?

    A. A rectangle is a parallelogram.
    B. The diagonals of a rectangle are congruent.
    C. If a parallelogram has congruent diagonals, it is not a rectangle.
    D. If a parallelogram has at least one right angle it is a rectangle.
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  2. #2
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    Hello, dgenerationx2!

    Most of these are straight forward.
    Exactly where is your difficulty?


    8. Maria is making a quilt. She has a large piece of fabric that is 0.03 mm thick.
    The fabric is cut in half and one piece is placed on top of the other to make a pile.
    This pile is cut in half, and one half is placed on top of the other to make an even higher pile.
    Continuing this process, what would the thickness of the pile be after the 4th cut and piling?

    . . A)\;0.0012\text{ mm} \qquad B)\;0.06\text{ mm} \qquad C)\;0.48\text{ mm} \qquad D)\;24\text{ mm}
    You should be able to walk through it . . .

    . . \begin{array}{|c|c|}\hline \text{Cut/pile} & \text{Layers} \\ \hline 0 & 1 \\ 1 & 2 \\ 2 & 4  \\ 3 & 8 \\ 4 & 16 \\ \hline\end{array}

    After 4 cut/piles, there are 16 layers of cloth, each is 0.03 mm thick.

    Therefore . . .



    10. Ole MacDonald has a farm lot that is shaped like a rectangle
    and is 40 feet wide and 50 feet long.
    He wants to put a fence around three sides of the lot: both widths and one length.
    If the posts are to be 10 feet apart, how many posts does he need?

    . . A)\;14 \qquad B)\; 13 \qquad C)\;11 \qquad D)\;15
    Can't you make a sketch?
    Code:
                   50
          * - * - * - * - * - *
          |                   |
          *                   *
          |                   |
       40 *                   *
          |                   |
          *                   *
          |                   |
          *                   *

    Well? . . .

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