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How do you work out the circumference and area of a circle?

When working with circles we use which is a number that stays the same no matter how big the circle. The number starts with 3.1415.... and goes on forever, this number is programmed into the calculator, so w...
NV
Answered by Nina V. • Maths tutor
6178 Views

Describe how a sperm cell is adapted to its role

Contains enzymes to digest egg cell wallFull of mitochondria to supply energy for movementtail for swimming Sperm contains generic material to transfer to the egg
RJ
Answered by Rachelle J. • Biology tutor
3980 Views

How does the body respond to a decrease or increase in core body temperature?

If the temperature decreases:The blood vessels supplying the skin constrict (vasoconstriction) resulting in less blood flow to the skin surface and hence less energy (by heat) is lost. Hairs stand on end to ...
PJ
Answered by Portia J. • Biology tutor
13094 Views

I'm struggling with understanding Shakespeare, how can I get around this problem?

Firstly, No Fear Shakespeare is a great place to start. It is a resource where it places the original text next to a translated version to help understand Shakespeare in a modern day context. It is available...
GW
4188 Views

Solve the following equation: (3(x-6) - 81)/4x = 0

The first step is to realise that a trivial solution of x is x = 0, which can be determined from the '4x' denominator. Now zooming in on the numerator and expanding gives us '3x^2 - 18 - 81'. Looking at the ...
HP
Answered by Harry P. • Maths tutor
3629 Views