Find an exponential model for the situation described

Assignment Help Electrical Engineering
Reference no: EM13250281

The number of cell phones recycled or refurbished instead of being sent to landfills is increasing by about 30% per year since 2004. In 2008, 5.5 million cell phones were recycled or refurbished.

(a) Find an exponential model for the situation described above.

(b) according to your model, how many cell phones were recycled or refurbished in the year 2004?

(c) Why did you choose your input the way you did in part (a)?

Reference no: EM13250281

Questions Cloud

Aid in identifying potential hazards : What sources do communities have to aid in identifying potential hazards?
Find the equivalent capacitance between a and b : A network connected between terminlas a and b consists of two parallel combinations that are in series. The first parallel combination is composed of a 10 OHM resistor and a 19 OHM resistor.
Determine the rotational kinetic energy : A 12.0-kg cylinder rolls without slipping on a rough surface. At an instant when its center of gravity has a speed of 12.2 m/s, determine the rotational kinetic energy about its center of gravity
What symptoms of diseconomies of scale appear : What are the economies of scale in operations management class size? As class size increases, what symptoms of diseconomies of scale appear?
Find an exponential model for the situation described : The number of cell phones recycled or refurbished instead of being sent to landfills is increasing by about 30% per year since 2004. In 2008, 5.5 million cell phones were recycled or refurbished. (a) Find an exponential model for the situation desc..
Compare and contrast natural and technological disasters : Compare and contrast natural and technological disasters, providing examples to support your answer.
Repeat for the same particle in hydrogen gas : Estimate the time required for a 5 MeV alpha particle to slow down and stop in silicon. repeat for the same particle in hydrogen gas
What is the main difference between the two cases : Two dc motors are compared. the first one is a 4hp dc motor which draws a current or 0.7A when the field is connected to a 150V source. the second, a 600 hp motor draws a field current of 5A when the field is connected to a 300V dc source.
What are the major hurdles to continuing quality improvement : Considerable success has been achieved by companies practicing TQM. What are the major hurdles to continuing quality improvements that manufactures and service providers face?

Reviews

Write a Review

 

Electrical Engineering Questions & Answers

  Why is the ability unique to sychronous alternators

a) the synchronous generator has a unique ability whihc places it at the top of the heap of all machines that might be used for generation of electric power. This unique capability is what allows the business of electric dispatch to even occur.

  Determine the stability of the closed-loop system

The loop transfer function L(S) of a single-feedback-loop control system is given below. Sketch the Nyquist plot of L(jw) for w=0 to w=infinity, Determine the stability of the closed-loop system.

  Design a low pass filter to suppress the carrier

At the receiver, demodulate the double side band signal S(t) = [cos(90*pi*t) + cos(120*pi*t)] * [cos(400*pi*t)], with the local carrier cos(400*pi*t). Design a low pass filter to suppress the carrier and plot the amplitude spectrum of S(t)

  Find a unity feedback control system with an unstable plant

Design a PD Controller G_c(s) = K_p + K_d*s using the root-locus method such that the closed-loop system has a damping ratio, zeta = 0.7 and a natural frequency, omega_n = 0.5 rad/sec.

  Determine the resistivity of the wire

And how long it will take to reach that temperature assuming no heat lost in the process and comments on your results and may research the properties of nichrom wire to determine the resistivity of the wire

  Find the surface temperature in k of the computer chip

For computer chip of 10mm (length), 5 mm(width) is operated by power of 0.645 watt, which surrounded by coolant material of temp of 80 F. Find the Surface Temperature in K of the computer chip during the heat transfer of convection.

  Find the efficiency as an autotransformer delivering rated

A 5 KVA 480/120 V single phase transformer is to be used as an autotransformer to transform a 600 V source to a 480 V supply. As a single phase transformer delivering rated load at 0.8 PF Lag its efficiency.

  Which is the correct syntax for the concurrent signal

The detector will take in numbers from 1510 to 010 encoded in binary labeled [N3:N0] with N3 being the most significant bit. The output will be asserted when the decimal value of the input is a prime number (i.e., 2,3,5,7,11,13). The output is de-..

  Interface binary i/o devices to the microcontroller

Interface binary Input Output devices to the microcontroller

  Explain the boolean expression in sum of product form

b. Draw the logic diagram, using the original Boolean expression. d. Obtain the truth table of the function form the simplified expression and show that it is the same as the part one. e. Draw the logic diagram from simplified expression, and compare..

  What is the value of the smallest resistor

The voltage drops across three resistors in series are measured 10V, 15V, and 25V. If the largest resistor is 47 ohms, what is the value of the smallest resistor?

  Find the magnitude of the electrical field at a position

A long straight metal wire of radius r1= 2.20E-2 m is surrounded by a metalic cylindrical shell of inner radius r2= 1.24E-1 m and outter radius r3= 1.91E-1 m. The axes of the wire and the cylindrical shell coincide.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd