Answer:
30 units of Food A and 45 units of Food B are to be purchased to keep costs at the minimum $105.
Explanation:
X = Amount of food A
Y = Amount of food B
Z= 2X+Y..... minimum cost equation
50X + 20Y > 2400 .................Vitamins .......(1)
30X + 20Y > 1800 ...................Minerals.......(2)
10X + 40Y > 1200 .................Calories ..........(3)
X > 0
y > 0
X=30 and Y = 45
Z= 2(30) + 45 = $105
Answer:
Hi Riahroo! This is a good question on the concept of relational databases.
We can normalize the relations as follows:
Flight
(flightnumber (unique), flighttime, airline_id, departure_city, arrival_city, passenger_id, pilot_id, airplane_id)
has_one_and_belongs_to :airline
has_many :passengers
has_one :pilot
Itinerary(passenger_id, flight_id)
Belongs_to
Passenger_details
(passengername (unique), gender, date_of_birth)
has_many :flights
Pilot
(pilotname (unique), gender, date_of_birth)
has_many :flights
airline(airlinename)
airplane(planeID, type, seats))
Explanation:
To normalize a relation, we have to remove any redundancies from the relationships between database objects/tables and simplify the structure. This also means simplifying many-to-many relationships. In this question, we see there is a many-to-many relationship between flights and passengers. To resolve this we can introduce a join table which simplifies this relationship to a one-to-many between the objects.
Answer:
great enough to overcome.
Explanation:
Kinetic energy can be defined as an energy possessed by an object or body due to its motion.
Mathematically, kinetic energy is given by the formula;
Where, K.E represents kinetic energy measured in Joules.
M represents mass measured in kilograms.
V represents velocity measured in metres per seconds square.
A conductor can be defined as any material or object that allows the free flow of current or electrons (charge) in one or more directions in an electrical circuit. Some examples of a conductor are metals, copper, aluminum, graphite, etc.
When heating a substance, a phase change will start to occur when the kinetic energy of the particles is great enough to overcome the attractive forces between the particles.
Basically, the phase change includes solid, liquid and gas.
Answer:
top row, left column, right column, bottom row and Apply or ok.
Explanation:
The question above wants to test our knowledge on the use of Excel app. (application) or software worksheet and this is in how create names in the Create from Selection feature in the Formula tab.
Check the steps in the creation of names in the Create from Selection feature in the Formula tab below;
(1). Highlight your range(note that this must include the rows and the columns) , (2). Click on FORMULAS, then select CREATE FROM SELECTION from the pop up options, (3). Then, in the section where you can see CREATE NAMES FROM SELECTION make sure you click on all the check boxes included, (4). Click on TOP ROW(If you have only the row at the header) and vice versa, (5). Click on TOP ROW and LEFT COLUMN(if both are involved) and vice versa, and (6). Click on APPLY or OK.
