(radical) √640 estimated to the nearest hundredth.

1 answer:

7 0

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Radical Form
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$\sqrt{640} = \sqrt{64 \times 10} 
$

$\sqrt{640} = \sqrt{64} \times \sqrt{10} 
$

$\sqrt{640} = 8 \sqrt{10}$

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Decimal Form
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$\sqrt{640} = 25.298$

$\sqrt{640} = 25.30$

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Answer : √640 = 25.30 (nearest hundredth)
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A roulette wheel has the numbers 1 through 36, 0, and 00. A bet on four numbers pays 8 to 1 (that is, if you bet $1 and one of t

Natasha_Volkova [10]

Answer:

Lose $0.05

Step-by-step explanation:

There are 38 possible spots on the roulette wheel (numbers 1 to 36, 0 and 00).

If the player can choose four numbers on single $1 bet, his chances of winning (W) and losing (L) are as follows:

$P(W) = \frac{4}{38} \\P(L) = 1-P(W) = 1-\frac{4}{38} \\P(L) = \frac{34}{38}$

The expected value of the bet is given by the probability of winning multiplied by the payout ($8), minus the probability of losing multiplied by the bet cost ($1)

$EV=\frac{4}{38}*\$8 -\frac{34}{38}*\$1\\EV= -\$0.05$