3 years ago

Which equation is an identity?

Mathematics

1 answer:

Alecsey [184]3 years ago

6 0

Answer:

Step-by-step explanation:

A and B are not, and C doesnt work so D

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A local company makes a candy that is supposed to weigh 1.00 ounces. A random sample of 25 pieces of candy produces a mean of 0.

Firlakuza [10]

Answer: (0.994, 0.998)

Step-by-step explanation:

Given : Sample size : n= 25 < 30 , so we use t-test.

$\overline{x}=0.996\ \ ;\ s=0.004$

Critical t-value use for 98% confidence :

$t_{n-1,\alpha/2}=t_{24,0.01}=2.492$

Formula to find the confidence interval :-

$\overline{x}\pm t_{\alpha/2}(\dfrac{\sigma}{\sqrt{n}})$

i.e. $0.996\pm (2.492)(\dfrac{0.004}{\sqrt{25}})$

$=0.996\pm 0.0019936\approx0.996\pm0.002\\\\=(0.996-0.002,\ 0.996+0.002)\\\\=(0.994,\ 0.998)$

Hence, the required confidence interval : (0.994, 0.998)

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2 years ago

= #7 i

iren [92.7K]

Answer:

Step-by-step explanation:

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2 years ago

2/3 x - 4 equal negative 2

Fiesta28 [93]

Answer:

x = 3

Step-by-step explanation:

Given

$\frac{2}{3}$ x - 4 = - 2

Multiply through by 3 to clear the fraction

2x - 12 = - 6 ( add 12 to both sides )

2x = 6 ( divide both sides by 2 )

x = 3

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3 years ago

Diagram 1 shows a composite solid consisting of a cuboid and a right pyramid.

kondaur [170]

44 the total volume of this composite solid is 896

4 0

2 years ago

The following are the temperatures of 10 days in winter in °C. -5, 1, -2, 7, -3, 9, 7, -5, -2, -5 Work out the mean temperature.

Citrus2011 [14]

Answer:

probably 0.2 and sorry if wrong

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2 years ago

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