Use the picture and the table to answer the question. A black and white rock with no shine is shown. The rock appears to have a rough texture.

Item Mohs Hardness
fingernail 2.5
penny 3
knife 5.1
steel nail 6.5
You have found the mineral shown in the picture. A knife won’t scratch it, but a nail will.

Describe at least four properties that would help you identify the mineral.
Due todAy!

Use the picture and the table to answer the question.

A black and white rock with no shine is shown. The rock appears to have a rough texture.

Item Mohs Hardness

fingernail 2.5

penny 3

knife 5.1

steel nail 6.5

You have found the mineral shown in the picture. A knife won’t scratch it, but a nail will.

Describe at least four properties that would help you identify the mineral.

Due todAy!

Step-by-step explanation:

183,950!

Hope this helps!

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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step-by-step explanation:

sounds & other waves originate from any vibrating object