Who was the original inventor of the calculator?
Blaise Pascal
When was the first calculator invented?
1642
What did a calculator cost in 1970?
In the early 1970s, calculators could cost several hundred dollars, but by the end of the decade, the price had come down to make them much more affordable and much more commonplace.
Which one is the oldest calculated device?
abacus
How much were calculators in the 60s?
In the mid 1960s a state-of-the-art, battery-powered, transistorized portable calculating machine might weigh more than 50 pounds (23 kg) and cost in excess of $2,000. In 1967, American scientists and engineers Jack St.
Are old calculators worth anything?
Most vintage pockets electronic calculators are a dime a dozen, with few exceptions (an original 1975 HP-25 programmable calculator in great condition might be worth about $100 or so).
How much was a calculator in 1976?
297. Ball & Flamm give a 1976 price of $229.
How do Calculators Calculate?
Most calculators rely on integrated circuits more commonly known as chips. Integrated circuits contain transistors that can be turned on and off with electricity to perform mathematical calculations. The most basic calculations are addition, subtraction, multiplication, and division.
How is sin calculated?
Sine (sin) function – Trigonometry. In a right triangle, the sine of an angle is the length of the opposite side divided by the length of the hypotenuse. In any right triangle, the sine of an angle x is the length of the opposite side (O) divided by the length of the hypotenuse (H).
Is a calculator always right?
Yes, pretty much every calculator is wrong since it operates on the finite precision representation of numbers so you cannot avoid rounding and a truncation.
What does Range mean in math terms?
The range is the difference between the highest and lowest values in a set of numbers.
What is a range in math?
The range is the difference between the largest and smallest numbers. The midrange is the average of the largest and smallest number.
What is the formula for mode?
L = Lower limit Mode of modal class. fm = Frequency of modal class. f1 = Frequency of class preceding the modal class….Mode Formula Calculator.
| Mode Formula = | L + (fm – f1) x h / (fm – f1) + (fm – f2) |
|---|---|
| = | 0 + (0 – 0) x 0 / (0 – 0) + (0 – 0)= 0 |
What is the probability formula?
Formula for the probability of A and B (independent events): p(A and B) = p(A) * p(B). If the probability of one event doesn’t affect the other, you have an independent event. All you do is multiply the probability of one by the probability of another.
Can there be two modes?
In a set of data, the mode is the most frequently observed data value. There may also be two modes (bimodal), three modes (trimodal), or four or more modes (multimodal).
What is the formula of mole?
Avogadro’s number is a very important relationship to remember: 1 mole = 6.022×1023 6.022 × 10 23 atoms, molecules, protons, etc. To convert from moles to atoms, multiply the molar amount by Avogadro’s number. To convert from atoms to moles, divide the atom amount by Avogadro’s number (or multiply by its reciprocal).
What is number of mole?
A mole is a unit defined for the amount of substance. It is in the International System of Units (SI) and its short form is “mol”. It is the mass of that substance contains the same number of fundamental units such as atoms in 12.0 grams of 12 C.
What is the weight formula?
Weight is a measure of the force of gravity pulling down on an object. It depends on the object’s mass and the acceleration due to gravity, which is 9.8 m/s2 on Earth. The formula for calculating weight is F = m × 9.8 m/s2, where F is the object’s weight in Newtons (N) and m is the object’s mass in kilograms.
How many grams is a mol?
1 mole is equal to 1 moles In, or 114.818 grams.