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2 years ago

Can someone help me with these please? (Explain 2 and 3 please! And try to do all please!

Mathematics

2 answers:

butalik [34]2 years ago

8 0

here is the answer! it is 0n the picture i attached

viktelen [127]2 years ago

5 0

Answer:

1. 2×1/6=1/3

2. 4×3/8=1 1/2

3. 1/4x3=3/4

4. 2/5x 5= 2

Step-by-step explanation:

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A shipping company selects 75 random packages to check their weight.It finds that 3 packages were weighed incorrectly. How many

Misha Larkins [42]

Answer: 120 Packages

Step-by-step explanation:

Given

75 random packages are check

3 package is found faulty

So, the percentage of error is

$\Rightarrow \dfrac{3}{75}\times 100=4\%$

i.e. 4% packages is faulty

For 3000 sample, expected faulty packages are

$\Rightarrow 3000\times \dfrac{4}{100}=120\ \text{Packages}$

7 0

2 years ago

Customers arrive at a movie theater at the advertised movie time only to find that they have to sit through several previews and

sergij07 [2.7K]

Answer:

a) sample size is 40

Step-by-step explanation:

(a)

$\sigma=4$ minutes

Margin of error, E is 75 seconds E=75/60= 1.25 minutes.

The level of significance $\alpha= 0.05$ for 95% level of significance

For 95% confidence interval $z_{\frac{\alpha}{2}}=1.96$ from standard deviation table

Sample size required, n

$n=\left (\frac{z_{\frac{\alpha}{2}}\cdot \sigma}{E} \right )^{2}=\left (\frac{1.96\cdot4}{75/60} \right )^{2}=39.337984$

Rounding off, n=40

Sample size =40

Keywords:

95% confidence, sample size, Wall Street Journal

3 0

3 years ago

Go step by step to reduce the radical. V108 VOVO try You must answer all questions above in order to submit.

katen-ka-za [31]

To reduce the radical, you have to factorize 108.

108 is a multiple of 3, so to factorize it, you can divide it by 3

$\frac{108}{3}=36$

You can rewrite the square root as:

$\sqrt[]{3\cdot36}=\sqrt[]{3}\cdot\sqrt[]{36}$

The square root of 36 is equal to 6 so you can write the expression as:

$\sqrt[]{3}\cdot\sqrt[]{36}=6\sqrt[]{3}$

5 0

1 year ago

What value of x is line a parallel to line b?

Aliun [14]

Answer:

x=15

Step-by-step explanation:

the angle 7x+12 and 63 are on opposite sides of complimentary, meaning they add to 180.

180-63 = 117

117-12 = 105

105/7 = 15

8 0

3 years ago

What is 5 times 7h equal.does it equal 35h

RSB [31]

Yeah the answer is 35 because if you multiply 5x7 it will give u 35 for an answer

3 0

3 years ago