# Popular questions

A device for weighing. When the pans contain exactly the same mass the beam is in balance. You can place an object in one pan an...
The Gregorian calendar consists of the following 12 months:January - 31 days.February - 28 days in a common year and 29...
Two events are dependent if the first event affects the outcome or occurrence of the second event in a way the probability is cha...
0The strength of a correlation is measured by its absolute value. So a negative or inverse correlation can bestronger than...
A relative maximum point is a point where the function changes direction from increasing to decreasing (making that point a "peak" in th...
You find the complex conjugate simply by changing the sign of the imaginary part of the complex number. To find the complex co...
If you weigh 50 kilograms (about 110 pounds), then you weigh 50,000 grams. Divide your 50,000 grams by the 14 grams per balloon and you find th...
The equation of a circle appears as (x – h)2 + (y – v)2 = r2. This is called the center-radius form (or standard form) because it gi...
At the center of a confidence interval is the sample statistic, such as a sample mean or sample proportion. This is known as the point estimate...
The base unit is then multiplied or divided by powers of ten to represent larger or smaller measurements.The Metric System....
It is defined as that force necessary to provide a mass of one kilogram with an acceleration of one metre per second per second. One newton is ...
ANSWER: Protons (a) are the most acidic. Method 2. Proton (a) are bonded to SP3 carbons so pka ≈ 50. Proton (b) is bonde...
How Many Zeros in a Million? How Many Zeros in a Billion? Reference ChartNameNumber of ZerosWritten OutO...
The first 25 prime numbers (all the prime numbers less than 100) are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61...
Divide a percent by 100 and remove the percent sign to convert from a percent to a decimal. The shortcut way to convert fr...
Plant cells require mitochondria to produce energy for the cell, usually through photosynthesis during the day. When the sun sets and th...
The result of the force acting for the given amount of time is that the object's mass either speeds up or slows down (or changes direction). Th...
To find the value of sin 30 degree, we will use the following formula, Sinϴ = Perpendicular Hypotenuse. Thus, the value of Sin 30 de...
7x, or seven times in multiplication....
How to Calculate Average. The average of a set of numbers is simply the sum of the numbers divided by the total number of values in the ...
In geometry, a cube is a three-dimensional solid object bounded by six square faces, facets or sides, with three meeting at each vertex. The cu...
Therefore, the number 100 has 9 factors....
Therefore, the year 2000 will be a leap year, but the years 1700, 1800, and 1900 were not. The complete list of leap ye...
Solution Set of an InequalityExample: Solve 2x + 3 ≤ 7, where x is a natural number. 2x + 3 ≤ 7. Subtractin...
Specifically, one billion seconds is 31.69 years or a little more than 11,574 days....
"Prime Factorization" is finding which prime numbers multiply together to make the original number....
The litre (international spelling) or liter (American spelling) (SI symbols L or l, commonly, but incorrectly, abbreviated as ltr...
There are 10,000 possible combinations that the digits 0-9 can be arranged into to form a four-digit code....
Remember that a sequence is like a list of numbers, while a series is a sum of that list. Notice that a sequence converges if the limit ...
When you convert a mixed fraction to a decimal, there are two strategies:Change the mixed fraction to an im...
The American Heritage Dictionary of the English Language states "By convention, 12 AM denotes midnight and 12 PM denotes noon. Because o...
While, for example, the United States, Canada, Brazil, Japan and other countries consider Sunday as the first day of the week, and while the we...
What is a square? A square is closed, two-dimensional shape with 4 equal sides. A square is a quadrilateral. We can find t...
Polynomials are used in engineering, computer and math based jobs, in management, business and even in farming. In all careers requiring...
US Quarts (Liquid) to Liters tableUS Quarts (Liquid)Liters1 qt0.95 L
Four Corners Monument, marking the only spot in the United States where four states Arizona, Utah, Colorado, and
The hex code for white is #FFFFFF. Looking for a different hue?...
Percentage Change | Increase and DecreaseFirst: work out the difference (increase) between the two numbers ...
Percentage Calculator: 15 is what percent of 75? = 20....
Debbwie Bio/WikiBio/WikiBirth DateApril 3, 1997Age23 years oldProfess...
The answer is 30 feet....
If you count the number of seconds between the flash of lightning and the sound of thunder, and then divide by 5, you'll get the dist...
A quadrilateral has 4 sides, 4 angles and 4 vertices. A quadrilateral can be regular or irregular....
Use the tip of your thumb as a guide for measuring a tablespoon. As a general rule, the tip of your finger should measure about <...
The cross-sectional area of a cylinder is equal to the area of a circle if cut parallel to the circular base. The cross-sectional area is the a...
How many nodes are there in the 1s 2p and 3d orbitals how many nodes are in a 4f orbital. All four of these orbitals have 0 nodes. The 1s, 2p, ...
24-hour clock24-hour clock12-hour clock15:003:00 p.m.16:004:00 p.m.17:0...
In Euclidean geometry, two objects are similar if they have the same shape, or one has the same shape as the mirror image of the other. ...
There are 3 simple steps to subtract fractionsMake sure the bottom numbers (the denominators) are the same.
Decimal and Fraction ConversionFractionEquivalent Fractions5/810/1640/647/...
Answers to Questions (FAQ) Calculating the derivation domain of a function, noted Df′ , is to calculate the set of definition of its <...
Concavity relates to the rate of change of a function's derivative. A function f is concave up (or upwards) where the derivative f′ is...
Mutually Exclusive: can't happen at the same time. Examples: Turning left and turning right are Mutually Exclusive (you can't do ...
4:00 p.m. - 1600 hrs. 5:00 p.m. - 1700 hrs. 6:00 p.m. - 1800 hrs....
A six-sided shape is a hexagon, a seven-sided shape a heptagon, while an octagon has eight sides…...
How to find the mean, median and mode: MEANStep 2: Add the numbers up to get a total. Example: 2 +19 + 44 +...
Convert a Repeating Decimal to a FractionCreate an equation such that x equals the decimal number....
The sum of three angles of an isosceles triangle is always 180°, which means we can find out the third angle of a triangle if the two angles o...
The formula for determining the total square feet in a circular area is: A = Pi x R2 (Area = Pi x R-squared). This formula...
A month is a unit of time, used with calendars, which is approximately as long as a natural period related to the motion of the Moon;
Percent Off Table For 40.001 percent off 40.00 is 39.60The difference is 0.4020 percent off ...
Which best explains if quadrilateral WXYZ can be a parallelogram? WXYZ is a parallelogram because diagonal XZ is bisected....
For variance, apply a squared symbol (s² or σ²). μ and σ can take subscripts to show what you are taking the mean or standard deviation of...
The customary system of measurement is defined as a set of weights and measures used for measuring length, weight, capacity, and tempera...
Venn diagrams enable students to organise information visually so they are able to see the relationships between two or three sets of items. Th...
The remote interior angles are the two angles on the inside of the triangle that are not touching the exterior angle. Think of th...
Solving Equations with a Variable on Both Sides. After simplifying, the first step in solving an equation with a variable on both...
One can consider the mass of an object as a measure of how much physical “stuff” makes up that object. mass=density×volume (m=ρV). Densit...
Function, in mathematics, an expression, rule, or law that defines a relationship between one variable (the independent variable) and an...
In chemistry, a solution is a special type of homogeneous mixture composed of two or more substances. In such a mixture, a solute is a substanc...
Key PointsThe Pythagorean Theorem, a2+b2=c2, a 2 + b 2 = c 2 , is used to find the length of any side of a right trian...
A cube, rectangular prism, sphere, cone and cylinder are the basic 3-dimensional shapes we see around us....
Factors of 26: 1, 2, 13, 26....
Military Time 1650 is: 4:50 PM using 12-hour clock notation, 16:50 using 24-hour clock notation. How to tell and write military time: one-six-f...
Common Fractions with Decimal and Percent EquivalentsFractionDecimalPercent1/3...
Answer: The value or the quotient of 18/1000 is 0.018....
Percentage Calculator: 6 is what percent of 20? = 30....
Two lines are perpendicular if and only if the product of their slopes is . In other words, the slope of a line that is perpen...
1 million seconds is about 11 days. 1 billion seconds is about 31.5 years. And 1,000 (1 trillion) seconds is 31,709.8 years. ;p....
Thus, 2/3 is the simplified fraction for 20/30 by using the GCD or HCF method. Thus, 2/3 is the simplified fraction for
PentahedronNameVerticesFacesSquare pyramid (Pyramid family)55Tr...
We live in the 21st Century, that is, the 2000s. Similarly when we say "20th Century," we are referring to the 1900s. All ...
An isosceles triangle has two equal sides (or three, technically) and two equal angles (or three, technically). The equal sides are called legs...
Two times as many. Example: 8 is twice 4. Or happening two times. Example: "He asked her twice, but she didn't hear either time"...
The depreciation rate can also be calculated if the annual depreciation amount is known. The depreciation rate is the annual d...
Percentage Calculator: What is 5 percent of 10000.? = 500....
Sn = a + (a + d)+(a + 2d) + + (ℓ − 2d)+(ℓ − d) + ℓ. 2 n(a + ℓ) . We have found the sum of an arithmetic progression in terms of it...
The formula for finding the total measure of all interior angles in a polygon is: (n – 2) x 180. In this case, n is the number ...
The table in which values is only decreasing after -1 will be the table which shows a function is decreasing onl...
An acre is 43560 square feet o it it's a square of side length s feet then s2 = 43560. Hence s = √43560 = 208.71 feet. T...
Etymology. Ounce derives from Latin uncia, a unit that was one-twelfth (1⁄12) of the Roman pound (libra). The abbreviation oz
Kilometer/hour to Mile/hour Conversion TableKilometer/hour [km/h]Mile/hour [mi/h]...
How do words not only represent our thoughts but also represent our values? People tend to talk about the things that are important to t...
Millilitre or milliliter (mL, ml, or mℓ), a unit of capacity. Millilambert (mL), a non-SI unit of luminance....
Here's a pentagon, a 5-sided polygon. We multiply 3 times 180 degrees to find the sum of all the interior angles of a pentago...
How many times in a day, the hands of a clock are straight? Explanation: In 12 hours, the hands coincide or are in opposite direction 22 times....
So, in order to rationalize the denominator, we need to get rid of all radicals that are in the denominator.Step 1...
By 10th standard one should have mastered medium level trigonometry because in 11th and 12th a student will not only be exposed t...
Since 2 is prime, the prime factorization of 20 is 2 * 2 * 5 ....
Two triangles are congruent if they meet one of the following criteria. : All three pairs of corresponding sides are equal. : Two...