## Posts Tagged ‘rate’

March 22, 2020

Excellent Covid-19 stats update **here**.

Worse Case Scenario **here.**

Posted in %, algebra, COVID-19 DAY 50, Middle School, Year 7 mathspig, Year 9 Mathspig **|** Tagged %, average, cases, Corona, Covid 19, curious, daily, death, deaths, per day, rate, stats, total, World, world wide **|** Leave a Comment »

February 18, 2019

The follicle diagram (above) came from bgoffforensics blog. More on hair growth rates here.

**QUESTION 1:**

## How long to grow that really bad 70s style hair cut?

The length of Fabio’s hair (below) is approx 50cm.

t = 50/1.25 months

t=40 months

## t = 3 Years 4 months!!!!

## Is it worth the effort? Ha!

**QUESTION 2: **

The growth rates of 1.25 cm/month or 0.5 inches/month are rounded off. Calculations using these growth rates will produce different answers for very large numbers (as above). Read more about the above story in the Daily Mail, UK here. By the way, Asha has been growing her hair for 25 years. Her hair weighs 3 stone or 19 kg. You can find more hair records including the World’s longest ear hair here.

**QUESTION 3:**

Natasha lives in Rio de Janeiro, Brazil. Read more about Natasha in the Daily Mail here. Once again Mathspig has rounded off the length of hair for easy calculation. The Daily Mail puts Natasha’s ‘mane’ at 5 feet 2 inches or 157 cm. This is the length of hair to be cut off. So Mathspig adjusted the length to 180cm or the approx length of her longest hair.

Posted in %, 10 MATH JOKES, decimals, units length, Year 7 mathspig, Year 9 Mathspig **|** Tagged %, 1970s, 1980s, calculation, dreads, funny, growth, hair, haircuts, length, Maths, old, rate, ugly, world record, worst **|** Leave a Comment »

January 12, 2019

**Mathspig is amazed. She didn’t think there would be any hope of survival. But if the baddies sweep the machine gun tracking you as you run then …. see calcs below.**

**Are you feeling lucky Punk?**

Posted in 10 Movie Cliches Debunked with Maths, angles, arc, arc, Circle C, D and r, Hollywood Maths, Middle School, units speed, Year 7 mathspig, Year 9 Mathspig **|** Tagged Are you feeling lucky, assault rifle, automatic, calculation, fire, machine gun, Magnificent 7, Math, movie cliche, out run, Predator, punk?, Rambo, rapid fire, rate, sweep **|** Leave a Comment »

April 30, 2015

The follicle diagram (above) came from bgoffforensics blog. More on hair growth rates here.

**QUESTION 1:**

**QUESTION 2: **

The growth rates of 1.25 cm/month or 0.5 inches/month are rounded off. Calculations using these growth rates will produce different answers for very large numbers (as above). Read more about the above story in the Daily Mail, UK here. By the way, Asha has been growing her hair for 25 years. Her hair weighs 3 stone or 19 kg. You can find more hair records including the World’s longest ear hair here.

**QUESTION 3:**

Natasha lives in Rio de Janeiro, Brazil. Read more about Natasha in the Daily Mail here. Once again Mathspig has rounded off the length of hair for easy calculation. The Daily Mail puts Natasha’s ‘mane’ at 5 feet 2 inches or 157 cm. This is the length of hair to be cut off. So Mathspig adjusted the length to 180cm or the approx length of her longest hair.

Posted in algebra, decimals, Hair Maths, Junior School, Middle School, Rates, units length, Year 7 mathspig, Year 9 Mathspig **|** Tagged 1970s, 1980s, calculation, dreads, funny, growth, hair, haircuts, length, Math %, old, rate, ugly, world record, worst **|** 4 Comments »

August 6, 2013
## Here’s an interesting graph.

## Do you want to know where you are in the current world population?

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## ………………………………………………………………………………………………

## This interactive graph produced by the BBC is called What’s Your Number? …………….

## ………………………………………………………………………………………………

## Just to check how quickly the world population is changing … go to the World Pop clock.

##

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Posted in graphs, Middle School, Senior School **|** Tagged Australia, BBC, Graph, growth, Interactive, Math %, Maths, Middle school, Over, People, population, rate, Where are you?, World, You are here, You place in the world **|** Leave a Comment »

August 6, 2013
## How long will it take at the current rate for Australia to double its population?

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## This population equation came from Cool Math.

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## The current population growth rate for Australia (r) according to the ABS is 1.8%.

## ……………………………………………………………………………………….

## How long for Australia to double its population?

## ………………………………………………………………………………………

Posted in Uncategorized **|** Tagged 23 million, 38 years, Australia, australian Bureau of statistics, double, exponential, growth, Math %, Middle School Math, population, population equation, population maths, rate, rate of growth **|** Leave a Comment »

August 6, 2013
## If we double the rate of population growth in Australia, what will the population be in 38 years?

## …………………………………………………………………………………..

## Pop growth rate per year:…..r = 3.6 % = 0.036

## …………………………………………………………………………………..

##

## You can check your calculations here @ Wayne’s World Population Calculator.

##

Posted in %, Exponential Functions, Middle School, Rates, Senior School **|** Tagged Australia, Australian, controlling population, How long to double population, Middle School maths, Population growth, rate, World Population, World Population calculations **|** Leave a Comment »