Posts Tagged ‘rate’

h1

Math Joke 3:How long will it take you to grow a really bad 70s-styles haircut?

February 18, 2019

1 Mathspig 1980s hair

2 Hair follicle

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

QUESTION 1:

3 Mathspig how old is your hair!!!!

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!

4 Mathspig 1970s celebrity hair

QUESTION 2: 5 MAthspig world's Longest Dreads

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:

6 Mathspig Natasha's hair

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.

h1

3. You can out run machine gun fire

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?

h1

Hair Maths 3: How OLD is your hair?

April 30, 2015

1 Mathspig 1980s hair

2 Hair follicle

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

QUESTION 1:

3 Mathspig how old is your hair!!!!

4 Mathspig 1970s celebrity hair

QUESTION 2: 5 MAthspig world's Longest Dreads

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:

6 Mathspig Natasha's hair

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.

h1

7 Billion: You are here!

August 6, 2013

Here’s an interesting graph.

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

………………………………………………………………………………………………

Picture 1

………………………………………………………………………………………………

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.

 

 

h1

Double, Double, toil and trouble

August 6, 2013

How long will it take at the current rate for Australia to double its population?

……………………………………………………………………………………………………………………………………..

This population equation came from Cool Math.

…………………………………………………………………………………………

pop equation pic

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

……………………………………………………………………………………….

How long for Australia to double its population?

………………………………………………………………………………………

pop calcs Aust

h1

Grow, baby, Grow!

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

…………………………………………………………………………………..

pop calc Aus 2

 

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