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A girl saves money over 200 weeks. She saves 5p in Week 1, 7p in Week 2, 9p in Week 3, and so on until Week 200. Her weekly savings form an arithmetic sequence. Find the amount she saves in Week 200. Calculate total savings over the 200 week period.

In part (a) the majority obtained 403 and some wrote their answer as £4.03, there was the usual crop of arithmetic errors with 2 ×199 = 298 or 498 being quite common. In part (b) the sum formula was usually ...
SS
Answered by Selena S. • Maths tutor
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How does Steinbeck use foreshadowing in his novel, Of Mice and Men?

Firstly lets tackle understanding foreshadowment as a technique. Foreshadowing essential means to hint or relate an early part of the text to a later event, for example, in Of Mice and Men we learn early on ...
KG
Answered by Katie G. • English tutor
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Calculate the percentage, by mass, of carbon in cyclohexane. Give your answer to two significant figures.

formua of cyclohexane C 6 H 12 molar ratio is 1:2 (divide 6 and 12 by 6 ) to get mass ratio multiply by molar mass (1 x 12 and 2x1) 12:2 convert to percentage (12/14 = 6/7 = 85.7% carbon by mass )
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Answered by Tom F. • Chemistry tutor
11205 Views

A hair dryer uses 2000J in 5 seconds when on full power. The power used is?

we are told that E = 2000J and t = 5s we need to find P recall which formula used energy, time and power P = E/t sub in values P = 2000/5 = 400 W (DONT FORGET UNITS)
TF
Answered by Tom F. • Physics tutor
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Work out the value of 4a + 2b when a = 4 and b = 3.

first substitute all the values you know into the formula (use brackets to make your work clear) 4(4) + 2(3) we know that 2 numbers next to eachother means multiply so expand it 4 x (4) + 2 x (3) using BODMA...
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Answered by Tom F. • Maths tutor
11598 Views