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Eukaryotic cells are larger and more complex than prokaryotic cells. The eukaryotic cell contains a nucleus, which contains genetic material in the form of linear chromosomes. However, prokaryotic cells cont...

4.28 rounds down to 4; sqrt(99) is approximately 10; 7.83 rounds up to 8 So an appropriate estimate would be: (4x10)/8 = 40/8 = 5

-13 x + 7 > 2 -13 x > -5 x < 5/13 Remember multiply or divide a number by a negative number, you switch the inequality sign

This question can be solved in two ways. One way is to divide the whole equation, both sides by 3, which gives x-2=7. Then add 2 to both sides to give x=9. Another way is to work out the left hand side of th...

When a beta decay occurs there are a couple of things you need to remember. First of all you are right, the nucleus doesn't contain any electrons. It does however contain neutrons and protons. We know that p...