Top answers

What is the difference between breathing and respiration?

This was a question I was commonly asked when assisting GCSE science students in year 9/10. Breathing is simply taking air in through your nose/ mouth and down into lungs (and then breathing it out again). -...
JE
5364 Views

There are n sweets in a bag. 6 of the sweets are orange. The rest of the sweets are yellow. Hannah takes a sweet from the bag and eats it. Hannah then takes at another sweet. The probability that Hannah eats two orange sweets is 1/3. Show that n²-n-90=0

P(2 orange sweets) = P(orange sweet) * P(orange sweet) (6/n) * (5/(n-1)) = 1/3 30/(n(n-1)) = 1/3 90 = n(n-1) 90 = n 2 -n n 2 -n-90=0 as required
TV
Answered by Tim V. • Maths tutor
17119 Views

Evaluate policies which a UK government could use to control the activities of oligopolists. (25 marks)

An oligopolistic market is one where mutliple firms coexist in order to provide similar goods or services. The firm’s in this market are however, price makers despite similarities in the products. This allow...
TV
Answered by Tim V. • Economics tutor
35088 Views

What is alternative splicing

Splicing is a process where premRNA is transformed into mRNA. It involves the removal of Introns ( gene sequences which do not code for proteins ) and the attachment of exons (sequences which code for protei...
PA
Answered by Petros A. • Biology tutor
9950 Views

What is the quadratic formula and how do I use it?

The quadratic formula is a way of solving quadratic equations of the form: ax 2 +bx+c=0. By plugging in the values a,b and c into it, the solutions for x can be obtained:x = [-b +/- sqrt(b 2 -4ac)]/2a For ex...
PM
Answered by Patrick M. • Maths tutor
5462 Views