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Svetlanka [38]
3 years ago
7

The Mohs scale is used to measure: streak cleavage hardness luster

Mathematics
2 answers:
lesantik [10]3 years ago
6 0

Answer:

Hardness.

Step-by-step explanation:

A mineral's hardness is a measure of its relative resistance to scratching, measured by scratching the mineral against another substance of known hardness on the Mohs Hardness Scale.

Step2247 [10]3 years ago
4 0

Answer:

hardness

Step-by-step explanation:

number 3

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Find three consecutive even integers whose sum is 36.
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Look at 36/3 = 12. 
So let's try 12 along with the one before it and the one after it.

10 + 12 + 14 = 36

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Write in standard form: 800,000 + 70,000 + 400 + 6
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870,406

Step-by-step explanation:

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What are the common factors of 42 and 28
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The hours a week people spend answering and sending emails is normally distributed with a standard deviation of Ï = 150 minutes.
storchak [24]

Answer:

sample size n would be 149305 large

Value of n (149305) is too high, this will be the practical problem with attempting to find this confidence interval

Step-by-step explanation:

Given that;

standard deviation α = 150 min

confidence interval = 99%

since; p( -2.576 < z < 2.576) = 0.99

so z-value for 99% CI is 2.576

E = 1 minutes

Therefore

n = [(z × α) / E ]²

so we substitute

n = [(2.576 × 150) / 1 ]²

n = [ 386.4 ]²

n = 149304.96 ≈ 149305

Therefore sample size would be 149305 large

Value of n is too high, that would be the practical problem with attempting to find this confidence interval

4 0
2 years ago
Adam riese developed the signs + and - as mathematical operations what is the title of the work that introduced them?
Phoenix [80]

The title of the work introduced is Rechnung nach der lenge/auff den Linien und Feder.

<h3>What are mathematical operations?</h3>

In mathematics, an operation is a function that takes zero or more input values to a well-defined output value.

Adam Riese developed the signs + and - as mathematical operations and the title of the work introduced is Rechnung nach der lenge/auff den Linien und Feder.

Learn more about operations on:

brainly.com/question/20408113

#SPJ1

7 0
2 years ago
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