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bekas [8.4K]
3 years ago
8

Work out the value 3x10^-5 x 40,000,000 give you answer in standard form​

Mathematics
1 answer:
Olenka [21]3 years ago
3 0

<u>★ Solution:</u>

➣ {\sf{3\:x\:10^{-5}\:x\:4\:x\:10^7

➣ {\sf{(3\:x\:4)\:x\:(10^{-5+(-7)})

➣ {\sf{12\:x\:10^2

➣ {\sf{1.2\:x\:10^3

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3 years ago
A deck of cards contains 30 cards with labels 1, 2, . . . , 30. Suppose that somebody is randomly dealt a set of 7 cards of thes
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b)

\displaystyle\\|A|=\binom{10}{7}\cdot 3^7=\dfrac{10!}{7!3!}\cdot2187=\dfrac{8\cdot9\cdot10}{2\cdot3}\cdot2187=4\cdot3\cdot10\cdot2187=262440\\\\P(A)=\dfrac{262440}{2035800}=\dfrac{243}{1885}\approx12.9\%

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2 years ago
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