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katrin [286]
3 years ago
5

Im stuck and i donnt want to get it wrong :( can someone help me please. What is the answer?

Mathematics
1 answer:
kirza4 [7]3 years ago
3 0

Answer:

tax = .45

total cost = 4.95

Step-by-step explanation:

The price before tax is 4.50

The tax rate is 10%

The tax is

4.50 * 10%

4.50 * .10

.45

Add the tax of .45 to the total price

4.50 + .45 = 4.95

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Step-by-step explanation:

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3 years ago
The probability that a person in the United States has type B​+ blood is 12​%. Three unrelated people in the United States are s
V125BC [204]

Answer:

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Step-by-step explanation:

For each person, there are only two possible outcomes. Either they have type B+ blood, or they do not. The probability of a person having type B+ blood is independent of any other person. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

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This means that p = 0.12

Three unrelated people in the United States are selected at random.

This means that n = 3

Find the probability that all three have type B​+ blood.

This is P(X = 3).

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The probability that all three have type B​+ blood is 0.001728

4 0
3 years ago
If 5²+m × 5⁷ =5¹⁵ ,find the value of m<br>please answer this question fast thank you!​
rewona [7]

Answer:

m = 6

Step-by-step explanation:

Here, we want to find the value of m

To do this, we use the indices addition property for multiplication

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since the bases are equal, we equate the powers

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m = 6

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3 years ago
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