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A,B,C and D are points on a circle. ABCD is a square of side 7 cm. Work out the total area of the shaded regions. Give your answer correct to the nearest whole number.

To work out the shaded area, we first need to calculate the area of the square and the area of the circle. The shaded area is equal to the area of the circle minus the area of the square.
The area of...

Answered by Avnish S. • Maths tutor

15286 Views

What is the difference between DNA and RNA?

DNA and RNA are both examples of nucleic acids, and so are formed from long chains of nucleotides. However, there are three broad structural differences between the two. 1) DNA is usually found double-str...

Answered by Luke K. • Biology tutor

4244 Views

OCR C2 2015 Question 8: (a) Use logarithms to solve the equation 2^(n-3) = 18,000 , giving your answer correct to 3 significant figures. (b) Solve the simultaneous equations log2(x) + log2(y) = 8 & log2(x^2/y) = 7.

(a)This question actually tells us what to do. It is very hard to miss "use logarithms to solve...". So our first step is going to be to use logs (espec...

Answered by Jonathan H. • Maths tutor

6707 Views

What top tips would you give for the BMAT test?

The BMAT test is very demanding by medical and dental schools that use them as part of their admissions process. Effective preparation is vital to perform well and have a strong chance at getting those co...

Answered by Arpit G. • BMAT (BioMedical Admissions) tutor

2387 Views

If a person drinks a lot of water, the water content of their blood will increase. Describe how the water content of their blood is regulated.

Osmoreceptors in the hypothalamus detect the increase in water concentration. This stimulates the pituitary gland to release less ADH. This reduces the amount of ADH in the blood and so, reduces the amoun...

Answered by Avnish S. • Biology tutor

8845 Views