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FinnZ [79.3K]
3 years ago
14

Charlie guesses that his dog weighs 34.5 pounds. The dog actually weighs 32.7 pounds. What is the percent error in Charlie’s gue

ss, to the nearest tenth of a percent? 0.05% 0.5% 5.2% 5.5%
Mathematics
2 answers:
myrzilka [38]3 years ago
5 0

Answer:

The correct answer is that Charlie made a guess with a 5.2% error.

Step-by-step explanation:

We have that a % error could be written as

\% error=\frac{|approx-exact|}{exact}*100

where <em>approx is the estimate value that Charlie made, exact is the actual weight of the dog, and approx minus exact should be expressed in absolute value</em>.

<u>Doing this calculation</u>, we have that

\% error=\frac{|32.7-34.5|}{34.5}*100=\frac{120}{23}=5.22

and taking <u>the result to the nearest tenth of a percent</u>, we actually have the correct answer, wich is 5.2%.

zhuklara [117]3 years ago
4 0
The answer is 5.5 % because 34.5x5.5=32.7
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The base of the pyramid is a square what is the surface area if the pyramids height is 4 feet in the area of the base is 36 ft.?
KATRIN_1 [288]

Answer:

96 ft²

Step-by-step explanation:

The general formula for the surface area of a pyramid is:  

SA = \frac{1}{2}pl + B, were p = the perimeter of the base, l = the slant height and B = the area of the base

Since the area of the base is 36 ft², then each side is √36, or 6 ft. The perimeter is the sum of all the sides, so 6 x 4 = 24 ft.

Given the overall height of the pyramid is 4 feet, you can use the Pythagorean Theorem (a² + b² = c²) to find the slant height (hypotenuse) of the pyramid.  Using 3 feet for 'a' and 4 feet for 'b':

3² + 4² = c² or 9 + 16 = 25

25 = c² or c = 5

SA =  \frac{1}{2}(24)(5) + 36

SA = 60 + 36 = 96 ft²

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3 years ago
The sum of fifteen and six times a number t is eighty one
topjm [15]
3.86
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6 0
3 years ago
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tangare [24]

Answer:

(3+3) x (3+1)

Step-by-step explanation:

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8 0
1 year ago
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Aleks04 [339]
A. 2x+y=25; x+y=20
x represents cheese wafers and y represents chocolate wafers.

B. I will choose elimination since there is y and y. I can multiply one equation by -1 to get y and -y, which cancels out.
2x+y=25
-x-y=-20

Add equations
x=5

Plug x in
5+y=20
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Final answer: 5 cheese wafers, 15 chocolate wafers
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3 years ago
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Lelechka [254]

Answer:

Step-by-step explanation:

so the least common denominator is 12, so:

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9/12ab-5/12ab = 4/12ab, or 1/3ab

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2 years ago
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