Top answers

All subjects
A Level

How to correctly answer "To what extent" questions?

The most significant difference between GCSE and A-level history is the amount of emphasis markers place on analysis, interpretation and evaluation. For example, if we use the question “To what extent was...

CH
Answered by Colm H. History tutor
12442 Views

The number of bacteria present in a culture at time t hours is modeled by the continuous variable N and the relationship N = 2000e^kt, where k is a constant. Given that when t = 3, N = 18 000, find (a) the value of k to 3 significant figures

putting in the conditions: 18000 = 2000e^3k ..  ln(9) = 3k .. k=(1/3)ln(9)

BC
Answered by Benjamin C. Maths tutor
5284 Views

A circle has the equation x^2 + y^2 - 4x + 10y - 115 = 0. Express the equation in the form (x - a)^2 + (y - b)^2 = k, and find the centre and radius of the circle.

Rearrange the equation so that the x terms and y terms bracketed together, like so: (x^2 - 4x) + (y^2 + 10y) - 115 = 0. Complete the square on both sets of brackets, giving (x - 2)^2 - 4 + (y + 5)^2 - 25 ...

JB
Answered by Joseph B. Maths tutor
3993 Views

When do I use the preterite and when do I use the imperfect?

If you imagine a timeline (would draw out a line on the whiteboard here), the imperfect appears at some extended period over this. It is important to remember that the imperfect encompasses the ideas: som...

PS
Answered by Paddy S. Spanish tutor
2140 Views

How do I include quotations in essays?

There are several ways of including quotations in essays. I believe the best way is to use lots of quotations and ensure that they are embedded in your answer as to keep the argument smooth. Here is a goo...

PS
3823 Views

We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2026 by IXL Learning