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dolphi86 [110]
2 years ago
9

Fill in the blank with the correct number to balance the equation: 4Cr + 3O2 → Cr2O3

Mathematics
1 answer:
ivanzaharov [21]2 years ago
4 0

Answer:

2

Step-by-step explanation:

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Peter calculated that the theoretical probability of obtaining exactly two heads when flipping six coins is 23.4%. What number o
Nimfa-mama [501]

Answer:

The theoretical probability of obtaining exactly four heads when flipping six coins is also 23.4%.

Step-by-step explanation:

Getting x successes out of n trials is a binomial distribution and is given by:

p(x) = nC_{x} p^{n-x} q^{x}

Here, n = 6

x = 2

p = probability of one head = \frac{1}{2}

q = 1 - p

= 1-\frac{1}{2}

= \frac{1}{2}

Substitute these values, we get,

p(2) = 6C_{2} (\frac{1}{2} )^{6-2} (\frac{1}{2} )^{2}

= 15(\frac{1}{2} )^{6}

= \frac{15}{64}

= 0.234

= 23.4%

We know that 6C_{2} =6C_{6-2}

6C_{2} =6C_{4}

Now,

p(4) = 6C_{4} (\frac{1}{2} )^{6-4} (\frac{1}{2} )^{4}

= 15(\frac{1}{2} )^{6}

= p(2)

Hence, the theoretical probability of obtaining exactly four heads when flipping six coins is also 23.4%.

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3 years ago
PLEASE HELP! I NEED THE ANSWER SOON!
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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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1. The cost of 4 hates is $29.68. What is the unit price?
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To find the unit price, divide the total price by the number of items. A unit price is a unit rate for one item.

1. 29.68 / 4 = 7.42

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