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marissa [1.9K]
4 years ago
10

A local playground is rectangular and has an area of 76.5 square meters. One side of the playground is 10 meters long. Maria say

s, "The length of the other side is the quotient of 76.5 and 10, so move the decimal point in 76.5 two places to the left because there are two digits in the number 10." Explain and correct Maria's error.
Mathematics
1 answer:
Aleks04 [339]4 years ago
3 0

Answer:

The length of the other side is 7.65m

Step-by-step explanation:

Maria's mistake was that she wanted to move the decimal point 2 places to the left, when she should have moved it 1 place, since that is the number of zeros that the number 10 has.

To find the length of the rectangle, we simply divide the area by the width

a = area = 76.5 m

w = width = 10m

l = length

l = a/w

l = 76.5m² / 10m

l = 7.65m

The length of the other side is 7.65m

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andre [41]

Answer:

  f(x)=\dfrac{(x+3)(x-1)^2}{(x+4)(x+3)(x-2)^2}

Step-by-step explanation:

Each vertical asymptote corresponds to a zero in the denominator. When the function does not change sign from one side of the asymptote to the other, the factor has even degree. The vertical asymptote at x=-4 corresponds to a denominator factor of (x+4). The one at x=2 corresponds to a denominator factor of (x-2)², because the function does not change sign there.

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Each zero corresponds to a numerator factor that is zero at that point. Again, if the sign doesn't change either side of that zero, then the factor has even multiplicity. The zero at x=1 corresponds to a numerator factor of (x-1)².

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Each "hole" in the function corresponds to numerator and denominator factors that are equal and both zero at that point. The hole at x=-3 corresponds to numerator and denominator factors of (x-3).

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Taken altogether, these factors give us the function ...

  \boxed{f(x)=\dfrac{(x+3)(x-1)^2}{(x+4)(x+3)(x-2)^2}}

8 0
3 years ago
Mrs. Kennard has a circular garden with radius of 4.5 ft. she wants to put up a wood fence around half of garden and a steel fen
sveticcg [70]

Answer:108.33, assuming that the wood fence goes around the garden and doesn’t cut across it as well

Step-by-step explanation: 4.5 times 2 times pi to find circumference. Divide by 2 because it is only half of garden. Times by 12 to convert to inches. Divide by 36. Multiply by 23.

6 0
3 years ago
You randomly draw a marble from a bag, record its color, and then replace it. You draw a red marble
andre [41]
Make it a fraction
7/25 * 4/4 = 28/100
0.28 = 28 percent

There is a 28 percent chance the next marble will be red
5 0
3 years ago
How do you write 50% as a fraction?
satela [25.4K]

Answer:

\frac{1}{2}

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
A car that originally cost $20,000 depreciates by 15% each year in about how many years will be car be worth half its value use
DENIUS [597]
0.5=0.85^x  taking the natural log of both sides...

ln0.5=x ln0.85

x=ln0.5/(ln0.85)

x≈4.265

Then:

f=20000(0.85)^(4.265)

f=$10000.00 to nearest dollar
6 0
3 years ago
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