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The American with Disabilities Act (ADA) requires that the slope of a wheelchair ramp be no greater than 1:12. Which of the following is the minimum length of a ramp needed to provide access to a door that is 5.0 feet above the sidewalk?

A. 60 feet

B. 145 feet

C. 32.5 feet

D. 30 feet

Answer Explanation:

 To find the minimum length requires, we need to understand what slope in the question represents. The slope represents the ratio between the height to the length. Let x be the minimum length of the ramp. Then,

Now, we find the value of x by cross-products as follows

                                   

Thus, the minimum length required to provide access is 60 feet.

Therefore, the Correct Answer is A.

More Questions on TEAS 7 Math

  • Q #1: Which of the following is the mean of the test scores listed below? 80, 68, 74, 87, 96

    A. 80

    B. 78

    C. 96

    D. 81

    Answer Explanation

    the mean of a data set is the total scores divided by the number of tests.

    Total test scores =80+68+74+87+96=405

    Number of tests =5

    Mean test score =405/5=81

    The mean test score is 81.

  • Q #2: The length of a rectangular room is 8 feet greater than its width. Which of the following equations represents the area (A) of the room?

    A. A = w(w+8)

    B. A = 2w+2(w+8)

    C. A = 5(w+8)

    D. A = w+(w+8)

    Answer Explanation

    To find the area of the room, we form an equation of find an equation relating the length and width of the rectangle. If we let the width of the room to be w, then

    Width of the rectangle= w

    Length of rectangle=(w+8)

    Area of the rectangle, A= Length*width=(w+8)*w

    A=w(w+8)

    Thus, the area of the rectangular room is w(w+8).

  • Q #3: A circle has an area of 64π in2. Which of the following is the circumference of the circle in terms of pi ( π)?

    A. 9 π in

    B. 16 π in

    C. 4 π in

    D. 8 π in

    Answer Explanation

     we need determine the radius of the circle before we can find the circumference of the circle from the given area.

    Let r be the radius of the circle, then

    Substituting the value of area

    Dividing both sides by pi and taking square root on both sides yields

    Now, the radius of the circle is 8 in. and the circumference of the circle is given by the relation: