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MrRa [10]
3 years ago
6

A jewl case that holds 2 cds is 140mm x 120 mm x 9 mm what is the surface area of this jewl

Mathematics
1 answer:
Alenkasestr [34]3 years ago
3 0
The case will have 6 surfaces

Top + Bottom  Surface = 2 x 140 x 120 = 33600 square mm
Right + Left Surface = 2 x 140 x 9 = 2520 square mm
Front and Back Surface = 2 x 120 x 9 = 2160 square mm
Total =   33600 + 2520 + 2160 = 38280 square mm
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Normally when dealing with coins the probability of getting heads or tails is 0.5 each. However in this case since its an unfair coin, the probability of getting heads is 0.2. 
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