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kramer
3 years ago
13

Need help thank you mark brainliest

Mathematics
1 answer:
aliina [53]3 years ago
3 0

Answer: it says independent work

Step-by-step explanation:

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An article gave the following summary information for fracture strengths (MPa) of n = 196 ceramic bars fired in a particular kil
Oliga [24]

Answer:

54.80 MPa to 55.92 MPa

Step-by-step explanation:

Sample mean fracture strength (x) = 55.36 MPa

Sample standard deviation (s) = 3.99 MPa

Sample size (n) = 196.

The upper and lower bounds for a 95% confidence interval are given by:

U=x+1.960*\frac{s}{\sqrt{n}} \\L=x-1.960*\frac{s}{\sqrt{n}}

The upper and lower bounds of the confidence interval are;

U=55.36+1.960*\frac{3.99}{\sqrt{196}}\\U= 55.92\\L=55.36-1.960*\frac{3.99}{\sqrt{196}}\\L= 54.80\\

The 95% confidence interval for true average fracture strength is 54.80 MPa to 55.92 MPa

4 0
3 years ago
Which of the following is a solution of 4x2 = − 9x − 4?
mestny [16]
The solution is -0.609611 and -1.64, I do not think you can simply find this by factoring but the only way is graphing it
8 0
3 years ago
Read 2 more answers
Área of panel 5ft by 16ft
miv72 [106K]
The area of the panel is 80ft^2
7 0
3 years ago
F(x) = 2x-(x+6) for f(-3)
ICE Princess25 [194]
Plug in -3 for x
f(-3) = 2(-3) - (-3 + 6)
f(-3) = -6 - (3)
f(-3) = -9
Solution: f(-3) = -9
4 0
2 years ago
Read 2 more answers
two similar triangular prisms have surface areas of 64cm2 and 144cm2(the 2 means square) respectively. a.find the ratio of their
Hunter-Best [27]

Answer:

a.The ratio of the heights is the square roots of the both of them √64 and √144

which is 8 and 12

b.To find the height of the larger prism you use the ratio of the heights,in a ratio and proportion

8 - 49

12-x

8x/8=588/8

x=73.5

I hope this helps

4 0
3 years ago
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