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2 years ago

Part C: Describe the constraints of the domain. (3 points) MAX PTS AND BRAINLIEST

Mathematics

1 answer:

Umnica [9.8K]2 years ago

5 0

Answer:

Domain constraints include entity integrity and referential integrity and this domain is a set of values that may be assigned to an attribute. The entity integrity rule states that no part of a primary key cannot be null. Referential integrity states that each foreign key value must match a primary key value or be null

Each table has certain set of columns and each column allows a same type of data, based on its data type. The column does not accept values of any other data type.

Step-by-step explanation:

Domain constraints include entity integrity and referential integrity and this domain is a set of values that may be assigned to an attribute.

The ENTITY INTEGRITY rule states that no part of a primary key cannot be null while the REFERENTIAL INTEGRITY rule states that each foreign key value must match a primary key value or be null.

Each table has certain set of columns and each column allows a same type of data, based on its data type in which the column does not accept values of any other data type.

Therefore Domain constraints are user defined data type and can define in this way:

Domain Constraint = data type + Constraints (NOT NULL / UNIQUE / PRIMARY KEY / FOREIGN KEY / CHECK / DEFAULT)

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The perimeter of a rectangle is 13cm and its width is 11/4. find its length.

enyata [817]

Perimeter = 2 length + 2 width

P = 2(l) + 2(11/4)

$13 = 2l +2* \frac{11}{4}$

$13 = 2l + \frac{2}{1} * \frac{11}{4}$

$13 = 2l + \frac{22}{4}$ (subtract 22/4 from each side)

$13 -\frac{22}{4} = 2l$

$13 -\frac{11}{2} = 2l$

$\frac{26}{2} -\frac{11}{2} = 2l$

$\frac{15}{2}} = 2l$

$7.5 = 2l$ (divide each side by 2)

7.5 ÷ 2 = l

3.75 = l

The answer is 3.75 or $3 \frac{3}{4}$

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2 years ago

I need a answer quick!!!!<br> Find 1/10 of 1/100 of a meter

Tema [17]

1/10= .1 of a meter
1/10 of 1/100= .001 of a meter

3 0

2 years ago

If the area of a park is exactly halfway between 2.4 and 2.5 acres, what is the area of the park

Ierofanga [76]

Answer:

2.45

Explanation:

Halfway of 2.4 and 2.5 is 2.45 because .05 is the halfway mark based on the place value.

6 0

2 years ago

A town has a population of 5000 and grows 3.5% every year. To the nearest tenth of a year, how long will it be until the populat

oksano4ka [1.4K]

Answer:

Step-by-step explanation:

This is an exponential function. In order to find the answer to the question, we need to first determine what the equation is that models this information. The standard form for an exponential function is

$y=a(b)^x$ where a is the initial value and b is the growth/decay rate. If the starting population is 5000, then

a = 5000

If the population is growing, that means that it retains 100% of the initial population and is added to by another 3.5%. So in a sense the population grows 100% + 3.5% = 103.5% or, in decimal form, 1.035. So

b = 1.035

Our function is

$y=5000(1.035)^x$ where y is the ending population and x is the number of years it takes to get to that ending population. We want to know how long, x, it will be til the population reaches 7300, y.

$7300=5000(1.035)^x$ and we need to solve for x. The only way to do that is by using logs. I'll use natural logs for this.

Begin by dividing both sides by 5000 to get

$1.46=1.035^x$ and take the natural log of both sides:

$ln(1.46)=ln(1.035)^x$

The power rule for natural logs is that we can now bring the exponent down in front of the ln to get:

$ln(1.46)=xln(1.035)$ To solve for x, we now divide both sides by ln(1.035):

$\frac{ln(1.46)}{ln(1.035)}=x$

Do that division on your calculator and get that

x = 11.0 years.

That means that 11 years after the population was 5000 it will be expected to reach 7300 (as long as the growth rate remains 3.5%)

5 0

2 years ago

If jl= 10x-2 JK = 5x-8 and KL = 7x-12 find KL

natta225 [31]

JK+KL=JL
(5x-8)+7x-12=10x-2
(add common terms together)
12x-20=10x-2
(get the term with x alone on one side of the equation)
2x=18
(divide by 2 to get x alone)
x=9

Find KL:
KL=7(9)-12
KL=51

8 0

2 years ago