From 2011 to 2012, attendance at a sports game went from 45,015 to 43,138, a decrease of 1,877.

Answers

Answer 1

The number representing the change in attendance from 2011 to 2012 is

-1877.

How to find the change in attendance

When we say it is a decrease of 1877, it means that the attendance in 2012 is 3886 less than the attendance in 2011.

The negative sign (-) in front of 1877 indicates that there was a decrease or reduction in attendance.

If it were a positive number, it would indicate an increase or growth in attendance. In this case, since the attendance decreased, we use a negative integer to represent the change.

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complete question

Use An Integer To Express The Number Representing A Change. From 2011 To 2012, Attendance At Sports Game Went From 45,015 to 43,138, a decrease of 1,877

Related Questions

The Stairmand HR cyclone is used to purify the surrounding air (density 1.2 kg/m^3 and viscosity 18.5x10^-6 Pa's) 2.5 m^3/s loaded with dust having a particle density of 2600 kg/m^3. The possible pressure drop is 1200 Pa and the required separation particle size should not be greater than 6 μm.
(a) What size cyclone do you need?
(b) How many cyclones are needed in what arrangement?
(c) What is the actual separation grain size achieved?

Answers

In order to determine the appropriate size of the HR cyclone, several factors need to be considered, include the density and viscosity of the surrounding air, airflow rate, dust particle density, maximum allowable pressure drop, and desired separation particle size.

What factors need to be considered when determining the size of the Stairmand HR cyclone for air purification?

The Stairmand HR cyclone is a device used for air purification. In order to determine the appropriate size of the cyclone, several factors need to be considered. The density and viscosity of the surrounding air are given as 1.2 kg/m^3 and 18.5x10^-6 Pa's, respectively.

The airflow rate is specified as 2.5 m^3/s, and the dust particles have a density of 2600 kg/m^3. The maximum allowable pressure drop is 1200 Pa, and the desired separation particle size should not exceed 6 μm.

To calculate the required size of the cyclone, various design parameters such as the cyclone diameter, height, and inlet/outlet dimensions need to be determined based on the given conditions and desired separation efficiency. The design process involves analyzing the airflow, particle dynamics, and pressure drop within the cyclone.

Once the size of the cyclone is determined, the number of cyclones required and their arrangement can be determined based on factors such as the total airflow rate, desired separation efficiency, and space constraints. The arrangement can be parallel, series, or a combination of both, depending on the specific requirements.

The actual separation grain size achieved can be evaluated by analyzing the cyclone's performance under operating conditions. This involves measuring the particle size distribution of the separated particles and comparing it with the desired separation particle size of 6 μm. Adjustments to the cyclone's design or operational parameters may be necessary to achieve the desired separation efficiency.

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