Answer: TRUE
Explanation: Composite is simply used to refer to the existence of more than one event or pattern. The composite primary key as related to database management query refers to the synergy or combination of more than one field or column of a specified table which is used in sorting or accurate identification of a record. When attributes are combined, that is more than one, it assists in narrowing down the returned records such that records which are close and exclusive to the options specified are returned. Usually, the more the number of columns which makes uo the case mpoaite keys, the more unique and well sorted our returned output is.
Answer:
The solution code is written in Python 3:
- calories = int(input("Enter number of calories: "))
- fats = int(input("Enter number of fat in grams: "))
-
- if(calories > 0 and fats > 0):
- cf = fats * 9
- if(cf < calories):
- percent = cf / calories
- if(percent < 0.3):
- print("Food is low in fat")
- else:
- print("Error input. Calories from fat cannot more than total calories")
- else:
- print("Error input. Calories and fats must be more than 0")
Explanation:
Firstly, use input function to ask user to enter total number of calories and fat in grams (Line 1-2)
Next we do the first input validation to check if the calories and fats are more than 0 (Line 4). If so apply formula to calculate calories from fats. If not, print error input message (Line 5, 13)
Then we proceed to next input validation to check if calories from fact more than total calories. If so, proceed to calculate percentage of calories from fats and if it is lower than 30%, display the appropriate message (Line 6 - 9). If fail the second input validation, the program will display another error input message again (Line 11)
Answer:
The C++ statement for the given algebraic expression 5x^2 + 15k + y^-2 is ( ( 5 * ( x * x ) ) + ( 15 * k ) + ( 1 / ( y * y ) ).
Explanation:
To convert the given algebraic expression 5x^2 + 15k + y^-2 into the C++ statement without using the pow function is:
In the given algebraic expression, there are three expressions combined using the + operator.
The first algebraic expression is 5x^2.
Here, x has a power of 2, and 5 is multiplied by the result of x^2. x having the power of 2 means x is multiplied itself twice. The C++ statement for this algebraic expression is (5 * ( x * x)).
The second algebraic expression is 15k.
Here, 15 is multiplied by k. The C++ statement for this algebraic expression is (15 * k).
The third algebraic expression is y^-2.
Here, x has a power of -2. it means 
. The C++ statement for this algebraic expression is (1/ (y * y).
The combination of all the three C++ statement is (5 * ( x * x)) + (15 * k) + (1/ (y * y).
I do and it’s going alright; would recommend. Here’s what I think in bullet points.
- Good aesthetic design. Weave-like texture is nice and somewhat opulent.
- Good performance; you can overclock the i7 CPU.
- Battery life is at the upper end of the spectrum.
- No USB Type A Ports, big downside.
- Graphics are about 1000 points above industry average (3D Mark Fire Spark)
- Uses an SSD rather than a HDD; much quicker load time.
- I’d go for the $1,899 personally; it’s worth the extra money.
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