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3 years ago

Mary has saved 17.50 in the past three weeks at this rate how much will she save in 15 weeks

Mathematics

2 answers:

leonid [27]3 years ago

5 0

17.50 divide by 3,times 15 =18.5

Kryger [21]3 years ago

3 0

Mary will have saved $87.50

$17.50 per three weeks
x per 15 weeks

17.50 x 5 = $87.50

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5(x-8)-(x+6)=18 solve for x

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3 years ago

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Yvette has 366 eggs to put into cartons. She puts one dozen eggs into each carton. How many cartons does she fill?

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2 years ago

drug sniffing dogs must be 95% accurate in their responses because their handlers don't want them to miss durgs and also don't w

GenaCL600 [577]

Answer:

95% Confidence interval: (0.8449,0.9951)

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 50

Number of times the dog is right, x = 46

$\hat{p} = \dfrac{x}{n} = \dfrac{46}{50} = 0.92$

95% Confidence interval:

$\hat{p}\pm z_{stat}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

Putting the values, we get:

$0.92 \pm 1.96(\sqrt{\dfrac{0.92(1-0.92)}{50}})\\\\ = 0.92\pm 0.0751\\\\=(0.8449,0.9951)$

(0.8449,0.9951) is the required 95% confidence interval for the proportion of times the dog will be correct.

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2 years ago

How do I solve this problem

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3 years ago