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Insulating a home costs £2000 and saves £50 a year. What is the payback time?

40 years.

LT
Answered by Leo T. Physics tutor
3616 Views

Differentiate y= (2x+1)^3. [The chain rule]

For maths questions I feel that getting your head around the concepts are difficult but once achieved allow you to comfortably answer a wide range of questions. Therefore for maths tuition I think it i...

JJ
Answered by James J. Maths tutor
17973 Views

Explain why an enzyme like maltase is specific to the breakdown of maltose.

With A-level biology it is just as important to know how to answer the question and what the examiners are looking for as it is to have the knowledge to do so. There are common questions that examiners...

JJ
Answered by James J. Biology tutor
6794 Views

Describe the formation of a gorge.

A gorge is formed as a result of a change in rock type at a waterfall. At the base of a waterwall the pressure and hydraulic action of the falling water causes the softer rock<...

EW
Answered by Ellie W. Geography tutor
56986 Views

What is the probability that a leap year has 53 Sundays?

This is pretty straight forward.
There are 366 days in a leap year, i.e, 1 more than a normal year.

Now, 52 weeks make up 344 days (52 x 7 = 344)
That means that we already ha...

YR
Answered by Yatharth R. Maths tutor
65701 Views

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