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Given that your grade for your computing is based on 5 coursework that weigh differently, and you know the results of 4: 80, 75, 50 and 90 which weighs 10%, 20%, 45% and 5%. What grade do you need in your last coursework to achieve at least a B (70%)?

You know the following: A) 80, 10% B) 75, 20% C) 50, 45% D) 90, 5% E) X, (100-10-20-45-5)% = 20% Therefore, create a formula with the facts given and the mean marks must be at least 70. Note that 10% is equi...
CZ
Answered by Chen Z. • Maths tutor
4870 Views

What is a proposed model for enzyme activity?

The lock and key model: Only substrates of a specific shape that is complementary to the active site of an enzyme can fit into the active site, in a way that is analagous to a key fitting into a lock.
AP
Answered by Alastair P. • Biology tutor
5391 Views

Explain what a hydrocarbon is, and suggest two properties of hydrocarbons that leave a fractioning column near the top.

A hydrocarbon is a molecule that contains only hydrogen and carbon atoms. Any two of the follwing properties are suitable answers: Low boiling points, low viscosities or high flammability.
AP
6037 Views

How do you solve this problem?

The problem is: ‘Tom travels from a to b and at a speed of 90km per hour. It takes him time ‘t’. Alice travels from a to b at a speed of 70km per hour. It takes her time ‘t+ 1 hour’. How long did it take for...
MG
9976 Views

How do I make calculations with percentages?

There is a simple way of making calculations with percentages. Say you want to subtract from a numerical value x,20%. Then multiply it with 80/100. Say you want to add 20%.Then multiply with 120/100. Say you...
MG
5376 Views