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The points A and B have coordinates (1, 6) and (7,− 2) respectively. (a) Find the length of AB.

AB 2 = (1 - 7) 2 + (6 + 2) 2 = 36 + 64 = 100 If AB 2 = 100 then AB = 10
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Answered by Antonio D. • Maths tutor
10707 Views

Calculate the shaded finite region between the curve and the axis for the curve: 3x^2 +11x -4 = 0

3x 2 +11x-4=0 #Factorise to find where the curve crosses the x axis (3x-1)(x+4)=0 #Each bracket equals 0 x=1/3, -4 #Integrate the curve between these two points to find the area enclosed in the curve [x 3 + ...
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Answered by Hugo F. • Maths tutor
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Consider the importance of age of US voters as a factor influencing voting behaviour

Age is a primacy social factor that influences how a voter casts their vote. One way age is a factor is that there is a trend showing that younger voters are more likely to vote Democrat and older voters are...
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Answered by Joanna C. • Politics tutor
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What are three differences between DNA and RNA? ( 3 marks)

RNA is single stranded whereas DNA is double stranded - RNA has the bases A,G,C and U whereas DNA has the bases A,G,C and T - An RNA nucleotide has ribose as its sugar component whereas a DNA nucleotide has ...
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Answered by Prahalad N. • Biology tutor
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It has been suggested that smoking, an epigenetic factor can lead to tumour growth and cancer. Use your knowledge of the epigenome and its structure to explain how this could occur. [5 marks]

Marking Scheme: MP1: Define epigenome- layers of chemical tags covering the DNA and histone protein complex MP2: Increased Methylation of DNA molecule MP3: enzymes attracted to complex/ acetyl groups removed...
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Answered by Hannah H. • Biology tutor
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