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A price is decreased by 27% The new price is £1138.80 Work out the original price.

This can be solved by making an equation for the old price. Make the old price be equal to x. To find the new price the old price must be multiplied by the percentage of the old price that remains. To find t...
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Answered by Oliver G. • Maths tutor
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N = 2a + b. a is a 2 digit square number, b is a 2 digit cube number. What is the smallest possible value of N?

First, the smallest values of a and b must be found and then substituted into the equation for N. To find a. A square number is a number that is the result of multiplying and number by itself . Eg 2 squared ...
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Answered by Oliver G. • Maths tutor
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Work out the value of 125 to the power of -2/3.

We want to find 125 -2/3 . To do this, we will need to use lots of power rules that we have learnt. Firstly, when we put a power to another power, we multiply the two powers. For example, (2 3 ) 4 (2 to the ...
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Answered by Joe R. • Maths tutor
38813 Views

What is a pathogen?

A pathogen is a microorganism that causes a disease. Pathogens spread communicable diseases meaning that they are transmitted person to person and are infectious. Types of pathogens include bacteria, fungi, ...
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Answered by Francesca D. • Biology tutor
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How can bacteria become resistant to antibiotics and how can doctors reduce the number of bacteria that become resistant?

-A mutation in a pathogen may produce a new strain. This new strain may become resistant to an antibiotic through natural selection . The new strain may spread rapidly as the individual is not immune to it a...
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Answered by Helen C. • Biology tutor
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