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d=rt

dataDistance formula

dateCharacteristics or information, usually numerical, that are collected through observation.

daythe day of the month or year as specified by a number

debtA unit of time equal to 24 hours

decademoney owed by one party to another party

decagonA unit of time equal to 24 hours

decay10 sided polygon or 10-gon

deciliterReduction in size from decomposition

decimalA unit of liquid measurement

decimal degreesNumber in the form a/b where the result is not a whole number

decimal placeexpress latitude and longitude geographic coordinates as decimal fractions

declining balance depreciationthe position of a digit to the right of a decimal point.

decomposedepreciation method using a ratio of salvage to asset value as a factor

decompose fractionbreak down a fraction into smaller parts

deficient numbersbreak apart a fraction where the numerators equal 1

degreeA number (n) with the sum of proper factors less than n

degrees of freedomA unit of angle measurement, or a unit of temperature measurement

deltanumber of values in the final calculation of a statistic that are free to vary

demandA letter of the greek alphabet used for math notation.

Δ δ

demoivres theorema consumer desire to purchase goods and services and willingness to pay a specific price for them

denominationA formula useful for finding powers and roots of complex numbers

z = rcis(θ), then z^{n}= r^{n}cis(nθ)

denominatorA currency unit

densityThe bottom portion of a fraction. For a/b, b is the denominator

dependent variableThe compactness measure of an object

depositA variable reliant on another variable

depreciationa sum of money placed or kept in a bank account, usually to gain interest.

derangementThe reduction in value of an asset over time

derivativepermutation with no fixed points

!n

descartes rulerate at which the value y of the function changes with respect to the change of the variable x

descendingdetermine the number of real zeros of a polynomial function

determinantto arrange numbers in decreasing order, that is, from largest to smallest.

dewey decimal systemvalue computed from a square matrix

det(A) or |A|

diagonalproprietary library classification system

diagonal of a squareline segment that goes from one corner to another, but is not an edge

diagonals of a polygonline segment that goes from one corner of a square to another, but is not an edge

diameterline segment that goes from one corner of a polygon to another, but is not an edge

diameter of a circledistance from two endpoints of a circle through the center

d = 2r

diameter of a cylinderdistance from two endpoints of a circle through the center

d = 2r

diametrically opposeddistance from two endpoints of a cylinder through the center

diametrically opposedTwo points on a circle or sphere at opposite ends of the diameter.

diceTwo points directly opposite each other on a circle or sphere

dices coefficientobjects used in games of chance wih 6 sides

differencestatistic used for comparing the similarity of two samples

|A ∩ B|/(|A| + |B|)

difference of proportionthe result of one of the important mathematical operations, which is obtained by subtracting two numbers

difference of squareshypothesis test to determine whether the hypothesized difference between population proportions differs significantly from the observed sample difference

digitBinomial factoring formula

a^{2}- b^{2}= (a + b)(a - b)

digit problemsAny of the numbers (0, 1, 2, 3, 4, 5, 6, 7, 8, 9) used to construct a number

digit productmath problems involving variables for each place value, h for hundreds, t for tens, and o for ones as an example

digit sumMultiplying the digits of a number and repeating the process of the product until all digits have been multiplied together

digraphAdding the digits of a number and repeating the process of the sum until the final sum is less than 10

dimea combination of two letters representing one sound

dimensioncurrency unit worth 10 cents

diophantinethe number of rows by the number of columns for a matrix

direct currentequation in which only integer solutions are allowed

directionUndirectional flow of an electric charge

directrixthe line or course on which something is going

discountline in a parabola not through the focus

discount ratethe amount by which the market price of a bond is lower than its principal amount due at maturity

discrete maththe interest rate used in discounted cash flow (DCF) analysis to determine the present value of future cash flows. Key Takeaways.

discrete random variableDeals with math structures which is not continuous, rather discrete

discriminanta type of variable whose value depends upon the numerical outcomes of a certain random phenomenon

disjoint setsShows how many roots and their properties a polynomial has

Δ

disjunctionSets with no common elements

displacementa binary connective classically interpreted as a truth function the output of which is true if at least one of the input sentences (disjuncts) is true, and false otherwise

distanceMovement of an object from it's current position

distance catch upinterval between two points in time

d = rt

distance rate and timeword problems involving a staggered start between 2 people or objects to see when they meet

distributionformula relating distance, rate, and time

d = rt

Distributive Propertyvalue range for a variable

divideProperty stating you can multiply a sum by multiplying each addend separately and then add the products

a(b + c) = ab + ac

dividendTo split into equal parts or groups

÷

dividend discount modela reward paid to the shareholders for their investment in a company's equity

dividingA formula used to value a stock based on the present value of dividends

P = D/(i - k) where i is the interest rate and k is the growth rate of dividends

divisibilityseparate a number into parts

divisionDetermine factors (whole numbers) for a given number

division equalityseparate a number into parts

Division Property of Inequalityf you divide one side of an equation by a number, you also must divide the other side by the same number so that your equation stays the same

divisorf you divide one side of an inequality by a number, you also must divide the other side by the same number so that your inequality stays the same

dollara number by which another number is to be divided.

dollar weighted interest methodCurrency unit

domainEvaluating a fund's interest based on the amount invested

dot productSet of all possible input values which makes the output value of a function valid

doubleThe sum of the products of corresponding components. Equivalently, it is the product of their magnitudes, times the cosine of the angle between them

a · b

double declining balance depreciationMultiply by 2

double factorialdepreciation method using a ratio of salvage to asset value as a factor. The asset loses value at twice the rate of the straight line depreciation method

doubling timeFactorial method subtracting 2 from each successive number, instead of 1 like a standard factorial

n!!

dozenthe amount of time it takes for a given quantity to double in size or value at a constant growth rate

drawing from a containerQuanity of 12

duplication and mediationProbability method of selecting objects from a container and computing the probability

durationAlgorithm to compute the product of two numbers, using even sub-products

the weighted average of the times until those fixed cash flows for a bond are received.