exam Maths Puzzle Numerical Ability

write this expression as a single term, without logarithms:

e^[[ln(18x^13)]-[ln(6x^3)]]

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exam Other Question

if a block is 6cm in length 5cm in breadth and 2cm in height and you double the sides as before do you find a similar relationship between the volume of the block and the volume of the block with doubled sides? I could really use help with this word problem:Stan invested $13000, part at 17% and part at 2%. If the total interest at the end of the year is $1,910 how much did he invest at 17%?