Top answers

How do you solve the equation e^2x - 2e^x - 3 = 0 ?

This is a 'quadratic in e^x'. The easiest way to recognise this when starting problems like this is to let y=e^x. As you practice problems like this, you will find yourself moving away from this step. But it...
LC
Answered by Lewis C. • Maths tutor
15931 Views

Describe the different levels of protein structure during the production of a protein

Primary Structure : Peptide bonds form between the carboxyl and amino groups of adjacent amino acids, forming a long polypeptide chain . Secondary Structure : Reactions and interactions, such as hydrogen bon...
GT
Answered by Grace T. • Biology tutor
3119 Views

24.3cm^3 of 0.02moldm-3 KMnO4 reacted with 20cm^3 of iron (II) solution. Calculate the molarity of the iron (II) solution.

Firstly calcuate the moles of KMnO4 by using the equation n=MV/1000 where n=moles M=molarity (moldm -3 ) and V= volume (cm 3 ). As the question gives the molarity and volume of KMnO4 you simply plug the valu...
AB
Answered by Anya B. • Chemistry tutor
12197 Views

A bacterial infection that cannot be treated with one sort of penicillin can be treated with a different sort. Use your knowledge of enzyme action to explain why the different sort of penicillin is effective in treating the infection.

Penicillin inhibits an enzyme that forms cross links in bacterial cell walls halting bacterial reproduction. Different penicillins have different shapes or structures. The penicillin that is not effective in...
GD
Answered by Georgia D. • Biology tutor
6646 Views

Given a graph with n nodes and m edges, every edge has a passing cost that can be negative, find the minimum distance between node 1 and every other node

We will use the Bellman-Ford algorithm to compute the minimum distance between that start node and every other one, by passing through each edge for a maximum of n times and "relaxing the edge", wh...
VS
Answered by Victor S. • Computing tutor
4600 Views