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64% of an audience are female. Work out the ratio females : males Give your answer in its simplest form.

64% are female. This 64% out of 100%. 36% are male So the ratio is 64 : 36 or 32 : 18 Can then be simplified to 16 : 9
JQ
Answered by Jordan Q. • Maths tutor
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When plant cells are placed in salt solution their appearance is different to when they are placed in distilled water. Explain these changes.

When the plant cells are placed in the salt solution, there is a higher concentration of water molecules in the cell and a lower concentration of water in the salt solution and thus a concentration gradient ...
CG
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A cuboid of height 5 cm has a base of side 'a' cm. The longest diagonal of the cuboid is 'L' cm. Show that 'a' = SQRT[ (L^2 - 25)/2]

A cuboid is made of squares and rectangles, with the diagonal 'L' connecting opposite corners of the 2 square faces. As the cuboids corners are all right angles, all the diagonals form right angled triangles...
JP
Answered by Joshua P. • Maths tutor
5370 Views

Energy is obtained from both aerobic and anaerobic respiration during exercise. Give three differences between aerobic and anaerobic respiration.

aerobic respiration uses oxygen for eaxaplme a relaxed human will be inhaling oxygen and their bodies using it to break down glucose in their cells. glucose + oxygen = carbon dioxide + water However anaerobi...
AG
Answered by Andrea G. • Biology tutor
7588 Views

A conical vase of base radius 5cm and height 20cm is filled with 200ml of water, how high is the water level? Give your answer to 3 significant figures.

Answer: 2.96 cm Equations used: Volume of a cone = (base area x height) / 3 ; Base Area = pi x radius 2 Volume of whole vase = (pi x 5 2 x 20)/3 = 523.6 cm 3 (4sf) therefore Volume of air in vase with 200ml ...
IC
Answered by Ian C. • Maths tutor
3968 Views