If 1 million alveoli have a surface area of 0.25m sq, then to work out the total surface area of 280 million you’ll have to multiply 0.25 by 280. 

No. of alveolI: SA of alveoli 
1 million.        : 0.25m sq
280 million.   : 70m sq

The scale factor on the left is 280, and so will it be for the right. 

Hope this helps. 


Maths

The average number of alveoli in each human lung is 280 million. The average surface area of 1 million alveoli is 0.25m squares. What’s the total surface area of a human lung?

The Sun made up of a total of 7 layers. 

From inside to out: 

3 inner layers: 
•core 
•radiative zone
•convection zone

4 outer layers:
•photosphere
•chromosphere
•transition region
•corona

Hope this helps. 

Physics

What are the different layers of the sun?

• First of all make sure to number (n) your terms (t) in the sequence above 
• Then work out the difference (d) which Is +7 each time 
•hence the base (b) for your nth term wIll be the difference x n = 7n 
•now you will check to see If the base works, If not you wIll alter it by addIng or subtracting a certaIn amount. In thIs case we are always 1 hIgher, so we IIst need to subtract 1 from the base. 
nth term = 7n -1

  (n) 1.    2.     3.     4.     5.
  (t) 6.   13.    20.  27.    35.
  (d)   +7   +7    +7  +7  
  (b) 7    14     21    28   35



What is the nth term rule of linear sequence below? 6,13,20,27,34

If every day the plant grows 2 New leaves, and after the 3rd day it had 6 leaves - then after 4 days it would have grown 2 more - making 8 in total 🙂

Our first plants grow 2 leaves every day , after one day it has two leaves , after 3 days it’s has six leaves , can you see a repeating pattern ?  how many leaves are there after 4 days ,

I‘m assuming the p is dividing the whole of the right side

 m = n+x/p
Xp      Xp    (X Is multiply)

mp = n+x 
-n        -n

mp-n = x 
answer: x = mp-n



Make x the subject of M = n+x/p

How many sides does a decagon have

There are 6 quadrilaterals you need to know about: 

•square (equal sides, 4 right angles)
•rectangle (opposite sides equal, 4 right angles)
•rhombus (all sides equal and opposite angles equal)
•parallelogram (opposite sides equal and opposite angles equal)
•kite (adjacent sides are equal, 2 side angles are equal)
•trapezium (one pair of parallel sides)



Wrote down the special name for this quadrilateral

I always advise my students to get a tutor across the Summer holidays. Although I agree students need a rest, having a couple of hours per week of tuition won’t harm that restful period and would in fact keep your brain switched on and active. You can get a great head start for your GCSE preparations. 

University

Im in year 9 school finishes on the 20th when should u get a tutor for my gcse?

The chance of an event occurring, usually expressed as a fraction. 

What is probability?

In order for something to be classified as a living organism, it needs to be able to carry out the 7 life processes ’mrs nerg’: movement, reproduction, sensitivity, nutrition, excretion, respiration and growth

So the sun is non-living

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