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3 years ago

I need help please someone

Mathematics

1 answer:

emmasim [6.3K]3 years ago

4 0

<span>Anna learns in her science class that the human eye blinks an average of 4,200,000 times a year. What is this number expressed in scientific notation?</span>

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What does it mean to be a unit of account

jolli1 [7]

Answer:

A unit of account in economics is a nominal monetary unit of measure or currency used to value/cost goods, services, assets, liabilities, income, expenses; i.e., any economic item. It is one of three well-known functions of money. It lends meaning to profits, losses, liability, or assets.

Step-by-step explanation:

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2 years ago

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Which rotation has the same result for both directions?

Neko [114]

Answer: Rotating a shape 90 degrees is the same as rotating it 270 degrees clockwise.

Step-by-step explanation:

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3 years ago

Plz help me with this

Gwar [14]

Answer:

Result is 3

Step-by-step explanation:

Every number elevated to zero is equal to 1

3*4^0 = 3

3*1 = 3

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3 years ago

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Select the correct answer.<br> What is the range of this absolute value function?

Oliga [24]

Answer:

I believe its c

Step-by-step explanation:

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2 years ago

The volume of construction work was increased by 60% but the productivity of labor increased by only 25%. By what percent must t

Stolb23 [73]

Answer: The answer is 28%.

Step-by-step explanation: Given that the volume of construction work was increased by 60% and the productivity of labour increased by 25% only. We are to find the percentage by which the number of workers must increase to complete the in time.

Let 'V' be the volume of construction work, 'p' be the productivity of labour, 'n' be the number of workers, and 'x' be the percentage by which the number of workers must increase.

According to the question, we have

$V=r\times n,\\\\\dfrac{8}{5}V=\dfrac{5}{4}r\times n(1+x).$

Dividing the second equation by the first equation, we have

$\dfrac{\frac{8}{5}V}{V}=\dfrac{\frac{5}{4}nr(1+x)}{nr}\\\\\Rightarrow \dfrac{8}{5}=\dfrac{5}{4}(1+x)\\\\\Rightarrow 1+x=\dfrac{32}{25}\\\\\Rightarrow x=\dfrac{7}{25}=0.28.$ .

Thus, the required percentage of workers that must increase in order to complete the work in time as scheduled originally is 28%.

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2 years ago