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3 years ago

12

Each of the 3 twins sleep in a twin bed. They all need sheets. At a store they have sheets that are 50% off and each sheet is 18

$ how much will 2 sheets cost and 6 sheets cost? How and why?

1 answer:

Debora [2.8K]3 years ago

7 0

Each sheet is $9 with the discount. 2 sheets would cost $18 because 9x2 is 18. 6 sheets would cost $54 dollars because 9x6 is 54.

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Select all answers that apply. Wave diffraction depends on the:

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Speed of the waves because a wave can get faster

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What is the equation for 3.24 and 2.4

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Answer:7.776

Step-by-step explanation:

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3 years ago

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A study was conducted to determine whether magnets were effective in treating pain. The values represent measurements of pain us

amm1812

Answer:

Given:

Sham: n= 20, x=0.44, s=1.24,

Magnet:n= 20, x =0.49, s= 0.95

For Sham:

Sample size, n = 20

Sample mean = 0.44

Standard deviation = 1.24

For Magnet:

Sample size = 20

Sample mean = 0.49

Standard deviation = 0.95

The null and alternative hypotheses:

H0: s1²=s2²

H1: s1² ≠ s2²

a) To find the test statistics, use the formula:

$\frac{s1^2}{s2^2}$

$\frac{1.24^2}{0.95^2} = \frac{1.5376}{0.9025} = 1.7037$

Test statistics = 1.7037

b) P-value:

Sham: degrees of freedom $= n - 1 = 20 - 1 = 19$

Magnet: degrees of freedom $= n - 1 = 20 - 1 = 19$

The critical values:

[Za/2, df1, df2)], [(1 - Za/2), df1, df2]

$f[0.05/2, 19, 19], f[(1 - 0.05/2), 19, 19]$

$f[0.025, 19, 19], f[0.975, 19, 19]$

$(2.526, 0.3958)$

The rejection region:

Reject H0, if F < 0.3958 or if F > 2.526

c) Conclusion:

Since the critical values of test statistic is between (0.3958 < 1.7037 < 2.526), we fail to reject null hypothesis H0.

There is insufficient evidence to to support the claim that those given a sham treatment have reductions that vary more than those treated with magnets

3 0

3 years ago

to find the final cost of the shoes, the $15 coupon can be applied first and then the 20% discount, or the 20% discount can be a

guapka [62]

First apply 20% discount then applied $15 coupon combination gives better deal.

As given in the question,

Let final cost of the shoes be $100

First apply $15 coupon then applied 20% discount

100-15=$85

Now, 20% of 85= (20/100) × 85

=$17

Final price, 85 - 17 =$68

First apply 20% discount then applied $15 coupon

Now, 20% of 100= (20/100) × 100

=$20

100-20 = $80

Apply coupon $15

Final price, 80 - 15 =$65

Therefore, first apply 20% discount then applied $15 coupon combination gives better deal.

Learn more about discount here

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8 0

1 year ago

mariarad [96]

Answer:

no

Step-by-step explanation:

2 boxes of eggs = 1.30 × 2 = 2.60

1 bottle of juice = 2.60

he payed 10 and got 0.90 so he payed 9.10

9.10-2.60-2.60= 3.90 which is the price of the 3 baguettes so.... 3.90÷3= 1.30£ is the price for 1 baguette

3 0

3 years ago