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An element's radioactive decay can be determined through a single equation which requires imputing the isotope's half life, its rate of decay and the decay time since the rate of decay is measured.

www.reference.com/world-view/calculate-exponential-growth-decay-191965d352b7cc7a

Exponential growth and decay can be determined with the following equation: N = (NI)(e^kt). In this equation, "N" refers to the final population, "NI" is the starting population, "t" is the time over which the growth or decay took place and the "k" represents the growth or decay constant. If necessa

www.reference.com/article/show-work-calculator-d86caba8806b95f1

A show work calculator, commonly referred to as a step-by-step calculator, is a digital calculator that shows its user every step made to arrive at the result of its input. Wolfram Alpha's step-by-step calculator solves quadratic equations, algebra problems and graphs in this manner.

www.reference.com/article/estimate-calculator-f4e0c4e8a8fd9805

An estimate calculator is a helpful financial planning aid that figures the approximate cost of an item or scenario. Government agencies, such as the IRS and the Social Security Administration, provide estimate calculators on their websites.

www.reference.com/science/speed-calculated-7d4208b9152eb0d6

Speed is also known as velocity, and it is calculated by dividing the distance traveled by the amount of time it took to cover that distance. This is expressed as a standard equation: V = D / T.

www.reference.com/article/work-hours-calculated-b89e2961cffee840

To calculate work hours, an employer records the time the employee arrives at a prescribed workplace, or on duty, and subtracts it from the time the employee stops working on that particular day. The U.S. Department of Labor describes work hours as the time when an employee arrives to work.

www.reference.com/article/calculate-percentage-basic-calculator-d938a32eddb34656

Percentage can be calculated on a basic calculator by multiplying with the percent button. If the percent button is not present, the percent amount can be converted to a decimal and that can be multiplied instead.

www.reference.com/article/calculate-percentages-calculator-16813e5e21b44070

To calculate percentages on a calculator, divide the part by the whole and then multiply the answer by 100. For example, to find what percent of 80 is 20, divide 20 by 80. The result is 0.25, then multiply 0.25 by 100 which equals 25 percent.

www.reference.com/article/beta-decay-equations-written-f0d2d310d75108a1

Writing a beta decay equations involves denoting the emission of a beta particle as the loss of an electron. Beta decay involves a neutron decaying into a proton and an electron emission (beta particle); the atomic number increases by one, but the mass number remains the same. The lost electron does

www.reference.com/article/life-expectancy-calculated-fdb1860b1f9918ea

Life expectancy calculators are based on age, gender, year born, height, weight, dietary habits, lifestyle, family medical history and geographical location. Calculations are created on using this information as an average made up of large amounts of population data.

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