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The diameter of a ring is 19mm. Calculate the area of the ring in cm^2, giving the area to 3 significant figures.

First you must convert the diameter into cm from mm:19/10 = 1.9cmThen you must find the radius of the ring:radius = diameter/2 = 1.9/2 = 0.95 cmThen you can calculate the area:area = 2πr 2 = 2 x π x (0.95) 2...
MP
Answered by Mary P. Maths tutor
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How do I write a Psychology 12 Mark Question?

When writing a 12 mark answer in Psychology, I find it is most helpful to first understand the Assessment Objectives. In these types of question, you are awarded marks for AO1 (content) and A03 (evaluation)....
RS
Answered by Rhea S. Psychology tutor
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Find the integral of the following equation: y = cos^2(x)

First convert y into a suitably form.cos(2x) = 1 - 2cos 2 (x)cos 2 x = (1-cos(2x))/2 integral of y = integral of (1-cos(2x))/2 = (1/2)*(x-(1/2)sin(2x)) + C = x/2 - sin(2x)/4 + C
MH
Answered by Marc H. Maths tutor
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What is a geometric sequence?

A sequence is defined as a function with domain the set of the natural numbers, and codomain the set of the real numbers. A geometric sequence (a_n) is a sequence of the form: a_n = a_(n-1)*r, where r is a c...
GK
Answered by Georgios K. Maths tutor
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Translate this sentence into English: 'By sailing quickly, Marcus reached the city in five days.'

The English translation would read as: Marcus celeriter navigando ad urbem quinque diebus pervenit. Marcus : this noun (Marcus, -i, (m)) is the subject of the sentence, and therefore is in the nominative cas...
LB
Answered by Lizzie B. Latin tutor
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