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alexgriva [62]
3 years ago
8

I need help please will mark the brainliest

Mathematics
1 answer:
jok3333 [9.3K]3 years ago
8 0

Answer:

i cant seee the picture

Step-by-step explanation:

can u retake it

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A local company wants to evaluate their quality of service by surveying their customers.
stich3 [128]

Answer: b. 0.98

Step-by-step explanation:

The formula to find the maximum error of the estimated mean :

E=z^*\dfrac{\sigma}{\sqrt{n}}            (1)

, where \sigma = standard deviation

n= Sample size

z* = Critical z-value.

As per given , we have

\sigma=5

n=100

Critical value for 95% confidence interval = z*=1.96

Put these values in the formula (1), we get

E=(1.96)\dfrac{5}{\sqrt{100}}

E=(1.96)\dfrac{5}{10}=0.98

Hence, the maximum error of the estimated mean quality for a 95% level of confidence is 0.98.

Therefore , the correct answer is b. 0.98 .

6 0
3 years ago
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HELP PLZ Given that ABEF⩭CBEF,m∠BED=82°,and m∠CBE=152°,find m∠A (Hint: The angles in a quadrilateral=360°)
lesya692 [45]
(A) 28 . Thanks for the question hope this helps
6 0
3 years ago
To solve this question you have to use TAN COS SIN i give brainiest
ElenaW [278]

Answer:

  • 4.3

Step-by-step explanation:

<u>Use cosine:</u>

  • cos = adjacent / hypotenuse
  • cos ∠L = KL/JL
  • cos 21° = 4/x
  • x = 4 / cos 21°
  • x = 4.3 (rounded)
7 0
2 years ago
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Gage skated 1 hr 15 min each day for 5 days and 1 hr 30 min each day for 3 days. How many minutes would he have to skate the nin
ruslelena [56]

Answer:help

Step-by-step explanation:

Help

3 0
3 years ago
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How to write 1.075 in expanded form
mihalych1998 [28]
Expanded form just means to expand the number out. To change this in to expanded form you just need to do the following:-

1.000 + 0.0 + 0.07 + 0.005 = 1.075.

Hope I helped ya!! 
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3 years ago
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