Universitat Politècnica de Catalunya

library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity xx1 is
generic( n : natural := 8 );
port( X,Y : in std_logic_vector(n-1 downto 0);
Z : out std_logic_vector(2*n-1 downto 0) );
end xx1;
architecture arch of xx1 is
begin
process (X,Y) begin
Z <= std_logic_vector(unsigned(X)*unsigned(Y));
end process;
end arch;
a) What is the function of the entity? Does it correspond to a combinational or
sequential circuit? What is the use of n? What is the use of the numeric_std
package? Reason your answers.
b) Draw logic waveforms of X, Y and Z to ilustrate how the circuit works. Inputs X
and Y must have at least 4 different values each.
c) Keeping the same package set, propose a simpler architecture body for entity
xx1. Justify your answer.
d) Write an alternative VHDL description for entity xx1, now removing the
numeric_std package and using other standard package(s).

Determineu un nombre positiu tal que la suma d'aquest numero amb el seu invers sigui minima. Quina es la suma minima?

or your school project, you’re planning to invest between $300,000 - $500,000 in a peer-to-peer service-based company. Let’s allocate your investment to the fixed and variable costs and then calculate the break-even point.

Fixed Costs Allocation (Assuming a $500,000 investment for simplicity):

• Salaries: $100,000
• Rent: $50,000
• Utilities: $20,000
• Marketing and Advertising: $80,000
• Technology Development: $150,000
• Insurance and Legal: $50,000
• Total Fixed Costs: $450,000

Variable Costs Allocation (These costs will vary, but we’ll set aside a portion of the investment):

• Transportation: $10,000
• Logistics Service Fees: $10,000
• Additional Charges: $5,000
• Labour: $15,000
• Contingency Fund: $10,000
• Cost of Services: This will depend on the agreements with equipment owners and land lessors, so we’ll allocate $50,000 for the initial phase. with this, calculate break even analysis for my company

HOW MUCH DO WE HAVE TO INVEST: our company is a service based which uses P2P, peer to
peer through our mobile app to provide services of land lease, equipment renting etc. based on our
market analysis, we came up with this:
􀁸 Technology Development: Investment in a robust mobile app and website platform.
􀁸 Local Teams: Salaries and training for local teams who will assist farmers.
􀁸 Marketing: Costs associated with promoting the service to both equipment owners and renters.
􀁸 Operational Expenses: Day-to-day running costs, including office space, utilities, and staff.
􀁸 Insurance and Legal: Coverage for rented equipment and legal fees for contracts and
agreements.
􀁸 Contingency Fund: A reserve to cover unexpected expenses or to provide flexibility in pricing to
attract initial users.
Based on the above we are looking at $300,000 - $500,000. this a company for our school project. what can be regarded as fixed and variable costs for a rental company of agricultural equipment, which also involves land leasing and hiring of labourers if the customer also needs that. based on the amount we intend to invest , can you you come up with the fixed and variable cost and the break even analysis for this company

En el circuito de la figura la resistencia R puede variar desde un cortocircuito hasta un circuito abierto y la resistencia equivalente (RAB) entre 30 y 75 Ω. Determine R1 y R2.

R1 y R2 estan en serie, a la ves estas estan en paralelo tanto con R como con RAB