# How do you calculate growth and decay rate?

## How do you calculate growth and decay rate?

Remember that the original exponential formula was y = abx. You will notice that in these new growth and decay functions, the b value (growth factor) has been replaced either by (1 + r) or by (1 – r). The growth “rate” (r) is determined as b = 1 + r.

## How do you find exponential decay?

In mathematics, exponential decay describes the process of reducing an amount by a consistent percentage rate over a period of time. It can be expressed by the formula y=a(1-b)x wherein y is the final amount, a is the original amount, b is the decay factor, and x is the amount of time that has passed.

How do you identify exponential growth and decay?

If a is positive and b is greater than 1 , then it is exponential growth. If a is positive and b is less than 1 but greater than 0 , then it is exponential decay.

How do you calculate exponential growth?

To calculate exponential growth, use the formula y(t) = a__ekt, where a is the value at the start, k is the rate of growth or decay, t is time and y(t) is the population’s value at time t.

### How do I know when I’m done growing taller?

There is typically a year or two of growth left once Tanner 5 begins. Hair along the linea alba, the line that “connects” your pubic hair to your belly button generally means that growth is over. For males, if you need to shave everyday to avoid a 5 o’clock shadow look, you are finished growing taller.

### What’s the average age for a boy to stop growing?

Boys who start puberty earlier than average (11.5 years) will stop growing sooner and boys who start puberty later than average will grow until an older age. The average age girls reach Tanner 5 is 14 – 15 years old. There is typically a year or two of growth left once Tanner 5 begins.

Is it possible to have a growth spurt during puberty?

In this case, your growth is pretty much over and done with, because females grow about 0.5 inches after age fifteen. Only one growth spurt occurs during puberty unless this persons genetics allow for multiple. Late bloomers are most common with multiple growth spurts, which is also why they tend to be taller people.

When does the body stop growing in puberty?

If you are asking when you are one growing taller, from the Height & Puberty Quora Space: Growth stops when puberty is complete, as the hormones play a large role in closing the bone’s growth plates. The final stage of puberty is called Tanner Stage 5.