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marysya [2.9K]
3 years ago
13

The soft-tissue lining of oysters and clams creates pearls. Is a pearl a mineral?

Computers and Technology
2 answers:
Kisachek [45]3 years ago
3 0
<span>A pearl is not a mineral because it is created artificially. It is a gemstone, not a mineral because it is a composite of mineral Aragonite and a protein compound which is called conchiolin. Pearls are formed by organic and living organisms which is preserved to become a gemstone.</span>
8_murik_8 [283]3 years ago
3 0

No. Pearl is an organic substance

Pearl is an organic gemstone. It is a reaction to an irritant within a living pearl-producing mollusk. Mollusks have a soft body often protected by a shell such as calm, mussel, and oyster. Pearls are actually formed when the mollusk produce thousands of nacre. Pearls are commonly used in the jewellery industry.


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Write a program that will ask the user for a set of ten numbers. After all ten numbers have been entered, the program will displ
muminat

Answer:

In Python:

nums = []

larg= []

small = []

while True:

   for i in range(10):

       num = int(input(": "))

       nums.append(num)

   print("Smallest: "+str(min(nums))); print("Largest: "+str(max(nums)))

   larg.append(max(nums))

   small.append(min(nums))

   another = int(input("Press 1 to for another sets: "))

   nums.clear()

   if not another == 1:

       break

   

print("Average Large: "+str(sum(larg)/len(larg)))

print("Average Small: "+str(sum(small)/len(small)))

Explanation:

This initializes the list of input numbers

nums = []

This initializes the list of largest number of each input set

larg= []

This initializes the list of smallest number of each input set

small = []

This loop is repeated until, it is exited by the user

while True:

The following iteration is repeated 10 times

   for i in range(10):

Prompt the user for input

       num = int(input(": "))

Add input to list

       nums.append(num)

Check and print the smallest using min; Check and print the largest using max;

   print("Smallest: "+str(min(nums))); print("Largest: "+str(max(nums)))

Append the largest to larg list

   larg.append(max(nums))

Append the smallest to small list

   small.append(min(nums))

Prompt the user to enter another set of inputs

   another = int(input("Press 1 to for another sets: "))

Clear the input list

   nums.clear()

If user inputs anything other than 1, the loop is exited

<em>    if not another == 1:</em>

<em>        break</em>

Calculate and print the average of the set of large numbers using sum and len    

print("Average Large: "+str(sum(larg)/len(larg)))

Calculate and print the average of the set of smallest numbers using sum and len

print("Average Small: "+str(sum(small)/len(small)))

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C2.5 - A group of four pirates has a treasure chest and one unique lock and key for each pirate. Using hardware that is probably
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Answer:

Explanation:

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Zolol [24]

Answer:

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Explanation:

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Jane Estroisch works as a manager in a multidomestic firm. She focuses on the long-term questions facing the organization such a
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Answer:

b

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Write a function with two parameters, prefix (a string, using the string class from ) and levels (an unsigned integer). The func
Allisa [31]

Answer:

Here is the program:

#include <iostream>  //to use input output functions

#include <string>  // to use functions to manipulate strings

using namespace std;  //to identify objects cin cout

void function(string prefix, unsigned int levels){  // function that takes two parameters, a string, using the string class and levels an unsigned integer

   if (levels == 0) {  //if number of levels is equal to 0

       cout << prefix << endl;  //displays the value of prefix

       return;    }  

  for (int i = 1; i <=9 ; i++){  //iterates 1 through 9 times

       string sections = (levels == 1 ? "" : ".");  //if the number of levels is equal to 1 then empty space in sections variable otherwise stores a dot

       string output = prefix +  std::to_string(i) + sections;   // displays the string prefix followed by the section numbers. Here to_string is used to convert integer to string

       function(output, levels - 1);   } }   //calls function by passing the resultant string and levels-1  recursively to print the string prefix followed by section numbers

int main() {  // start of main function

   int level = 2;  //determines the number of levels

   function("BOX", level);  } //calls function by passing the string prefix and level value

Explanation:

The program has a function named function() that takes two parameters, prefix (a string, using the string class from ) and levels (an unsigned integer). The function prints the string prefix followed by "section numbers" of the form 1.1., 1.2., 1.3., and so on. The levels argument determines how many levels the section numbers have. If the value of levels is 0 means there is 0 level then the value of prefix is printed. The for loop iterates '1' through '9' times for number of digits in each level. If the number of levels is 1 then space is printed otherwise a dot is printed. The function() calls itself recursively to print the prefix string followed by section numbers.

Let us suppose that prefix = "BOX" and level = 1

If level = 1 then the loop for (int i = 1; i <=9 ; i++) works as follows:

At first iteration:

i = 1

i <=9 is true because value of i is 1

string sections = (levels == 1 ? "" : "."); this statement checks if the levels is equal to 1. It is true so empty space is stored in sections variable so,

sections = ""

Next, string output = prefix +  std::to_string(i) + sections; statement has prefix i.e BOX plus value of i which is 1 and this int value is converted to string by to_string() method plus sections has an empty space. So this statement becomes

string output = BOX + 1  

So this concatenates BOX with 1 hence output becomes:

output = BOX1

At second iteration:

i = 2

i <=9 is true because value of i is 2

string sections = (levels == 1 ? "" : "."); is true so

sections = ""

Next, string output = prefix +  std::to_string(i) + sections; statement becomes

string output = BOX + 2  

So this concatenates BOX with 1 hence output becomes:

output = BOX2

At third iteration:

i = 3

i <=9 is true because value of i is 3

string sections = (levels == 1 ? "" : "."); is true so

sections = ""

Next, string output = prefix +  std::to_string(i) + sections; statement becomes

string output = BOX + 3  

So this concatenates BOX with 1 hence output becomes:

output = BOX3

Now at each iteration the prefix string BOX is concatenated and printed along with the value of i. So at last iteration:

At last iteration:

i = 9

i ==9 is true because value of i is 9

string sections = (levels == 1 ? "" : "."); is true so

sections = ""

Next, string output = prefix +  std::to_string(i) + sections; statement becomes

string output = BOX + 9  

So this concatenates BOX with 1 hence output becomes:

output = BOX9

After this the loop breaks at i = 10 because the condition i<=9 becomes false. So the output of the entire program is:

BOX1                                                                                                                                          BOX2                                                                                                                                          BOX3                                                                                                                                          BOX4                                                                                                                                          BOX5                                                                                                                                          BOX6                                                                                                                                          BOX7                                                                                                                                          BOX8                                                                                                                                          BOX9  

The program along with the output is attached.

4 0
3 years ago
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