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exis [7]
3 years ago
7

If the state sales tax rate is 8%, how much money will you need to purchase a pair of jeans costing $29.99 and a shirt costing $

16.99?
A. $3.75
B. $3.76
C. $50.73
D. $50.74
Mathematics
2 answers:
d1i1m1o1n [39]3 years ago
7 0
29.99 + 16.99 = 46.98

46.98 + 0.08(46.98) = 46.98 + 3.76 = 50.74 <==
LekaFEV [45]3 years ago
4 0
29.99+16.99=46.98. 46.98x8%=3.75. 46.98+3.75=50.73(C)
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If the adult dosage of the medicine is 180 milligrams (mg), what is 1/3 of the adult dose?
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Answer:

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Emily is solving the equation 2(x+9)=4(x+7)+2 where did she make an error
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Hello!

2(x + 9) = 4(x + 7) + 2

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Suppose a bag contains many marbles, 54% of which are purple. You draw 5 marbles from the bag with replacement.
dolphi86 [110]

Part A

Use the binomial probability distribution formula.

p = 0.54 = probability of getting a purple marble

n = 5 = sample size

x = 2 = number of purple we want to get

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The \frac{n!}{x!(n-x)!} portion is from the nCr combination formula. The exclamation marks indicate a factorial.

Alternatively, you could use Pascal's Triangle for that portion.

<h3>Answer: 0.283831776</h3>

This decimal value is exact. Round it however you need to.

============================================================

Part B

To find the expected value, aka the mean, we multiply the sample size and probability of getting a purple marble on any single selection.

n*p = 5*0.54 = 2.7

<h3>Answer: 2.7</h3>
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2 years ago
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