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sdas [7]
3 years ago
9

What is the efficiency of a machine that produces 4500 joules of output work for every 4250 joules of input work? (remember to p

ut it in correct units and round to the hundredths place)
Mathematics
1 answer:
rewona [7]3 years ago
4 0

Answer:

105.88%

Step-by-step explanation:

Efficiency:

Output/input × 100

4500/4250 × 100

105.8823529%

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Which two of the following are benefits of consumer programs?
Dennis_Churaev [7]

Answer:

The correct answer is 1) They help prosecute companies that sell unsafe products to consumers. And 4) They help consumers identify the best product reviews from various sources.

Explanation:

Consumer programs are all those that were created to provide the customer with the correct information about the products and their quality.

Nowadays, with the competition between the companies that present the same product, the client can feel confused about what product to consume. Still, through the consumer programs, the person can choose the best product depending on the program review, but in this way, You will be sure to select the right product based on your needs.

<em>I hope this information can help you.</em>

7 0
3 years ago
Read 2 more answers
Eh so im confused on this question ill give brainliest.
stiv31 [10]

Answer:

the perimeter is 28 and the area is 49

Step-by-step explanation:

a square has equals sides and i counted seven on each side for the perimeter. you multiply seven by seven to find the area

6 0
3 years ago
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The sector COB is cut from the circle with center O. The ratio of the area of the sector removed from the whole circle to the ar
mafiozo [28]

Answer:

Ratio = \frac{R^2 - r^2 }{ r^2}

Step-by-step explanation:

Given

See attachment for circles

Required

Ratio of the outer sector to inner sector

The area of a sector is:

Area = \frac{\theta}{360}\pi r^2

For the inner circle

r \to radius

The sector of the inner circle has the following area

A_1 = \frac{\theta}{360}\pi r^2

For the whole circle

R \to Radius

The sector of the outer sector has the following area

A_2 = \frac{\theta}{360}\pi (R^2 - r^2)

So, the ratio of the outer sector to the inner sector is:

Ratio = A_2 : A_1

Ratio = \frac{\theta}{360}\pi (R^2 - r^2) : \frac{\theta}{360}\pi r^2

Cancel out common factor

Ratio = R^2 - r^2 : r^2

Express as fraction

Ratio = \frac{R^2 - r^2 }{ r^2}

6 0
2 years ago
F(x) = 2x^2+ 5x + 20<br><br> Find f(-9)
8_murik_8 [283]

Answer:

137

Step-by-step explanation:

2(-9)^2+5(-9)+20

2(81)-45+20

162-45+20

117+20

137

8 0
3 years ago
Select whether the triangle is inscribed in the circle, circumscribed about the circle, or neither.
Ganezh [65]
Neither inscribed in the circle, nor circumscribed about it! 2 if the sides of the triangle are TANGENT to the circle, which means just touching at one point


3 0
3 years ago
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