Search our library of homework questions

Top answers

All subjects

All levels

Explain why a genetic fingerprint is unique to every individual

The genetic fingerprint is differentiated based on the differing lengths of short tandem repeats (STRs) between genes. Everyone has different lengths of STRs so when their DNA is hydrolysed by restriction...

Answered by Solomon B. • Biology tutor

2586 Views

A prism with a triangular cross section has volume 120cm^3. The base of the triangular face has length 6cm. The width of the prism is 10cm. The height of the triangular face is h. Find h.

Cross sectional area: half base x height = (6/2)h = 3h , Volume of prism: Cross sectional area x width, this gives: 3h10 = 120, rearrange: 3h = 12, Find h: h = 4cm.

Answered by Jake V. • Maths tutor

4815 Views

Factorise fully: 3x - 9x^2

3x(1-3x)

Answered by Jake V. • Maths tutor

6862 Views

Part 1 of a test has 60 marks, Part 2 has 100 marks. James scores 75% on part 1 and 48% on part 2. To pass the full test, he needs 60% of the total marks, does he pass?

75% of 60: 0.7560 = 45 , 48% of 100: 0.488100 = 48 , His total marks: 45+48 = 93 , Total marks available: 100+60 = 160 , His final percen...

Answered by Jake V. • Maths tutor

3748 Views

Evaluate whether a tax on petrol in the UK would reduce the demand for cars.

A specific tax is a fixed amount levied on purchases of a commodity. These are often used by the Government to reduce the quantity demanded of goods that produce a negative externality, which means that t...

Answered by Jodie G. • Economics tutor

2613 Views