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Komok [63]
3 years ago
6

A pharmacist has 80 milileters of a 25 percent saline solution. Which expression can be used to find the percentage of the conce

ntration
Mathematics
1 answer:
Thepotemich [5.8K]3 years ago
6 0

Answer:


Step-by-step explanation:

Final concentration % = [grams of salt / mililiters of solution] * 100


grams of salt = grams of salt from solution 1 + grams of salt from solution 2


grams of salt from solution 1 = mililiters * %/100 = 80 mililiters * 0.25 g/mililiters = 20 g


grams of salt from solution 2 = mililiters *%/100 = x*0.10 g/mililiters = 0.1x


mililiters of final solution = mililiters from solution 1 + mililiters from solution 2


mililiters of final solution = 80 mililiters + x mililiters


=> Final concentration, %  =  [0,10x + 20 g] / [x + 80 mililiters] * 100


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Answer: correct option is C

The function F(x) for 0 < x < 5, the block's initial velocity, and the value of Ff. 

Step-by-step explanation:

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K.E = 1/2mv^2

The speed V depends on the position:

0 < x < 5

Also, since work done = F × distance x

The workdone also depends on F(x)

The net force = 0 that is

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Where fr = frictional force.

Therefore the best option for the hypothesis of work done will be;

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3 years ago
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Which statement is true?
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Choice (B) is true.

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For (D): again, 3 is not a factor of 14.

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a. For a file whose size (in terms of number of bytes) is less than or equal to 12, then duplicate the contents of the file so t
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Answer:

#include <stdio.h>

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char* dirname = "Subdir1";

check = mkdir(dirname,0766);

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{

printf("Subdir1 Directory created\n");

 

char *dirname1="/Subdir1/D1";

if(mkdir("/Subdir1/D1", 0777)==-1)

{

printf("D1 Directory created\n");

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close(A1);

 

int A2 = open ("/Subdir1/D1/A2.txt", 0666);

write(A2, "you are beautiful\n", strlen("you are beautiful\n"));

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int A3 = open ("/Subdir1/D1/A3.txt", 0666);

write(A3, "this is terrible!\n", strlen("this is terrible!\n"));

close(A3);

}

else

{

printf("Unable to create directory D1\n");

exit(1);

}

if(mkdir("/Subdir1/D2", 0777)==-1)

{

printf("D2 Directory created\n");

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close(B1);

 

int B2 = open ("/Subdir1/D2/B2.ccc", 0664);

write(B2, "you are beautiful\n", strlen("you are beautiful\n"));

close(B2);

 

int B3 = open ("/Subdir1/D2/B3.ccc", 0664);

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printf("Unable to create directory D2\n");

exit(1);

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if(mkdir("/Subdir1/D3", 0777)==-1)

{

printf("D3 Directory created\n");

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close(C1);

 

int C2 = open ("/Subdir1/D3/C2.ddd", 0644);

write(C2, "you are beautiful\n", strlen("you are beautiful\n"));

close(C2);

 

int C3 = open ("/Subdir1/D3/C3.txt", 0644);

write(C3, "this is terrible!\n", strlen("this is terrible!\n"));

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printf("Unable to create directory D2\n");

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else {

printf("Unable to create directory Subdir1\n");

exit(1);

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return 0;

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Program 2:

#include <stdio.h>

 

long int findSize(char file_name[])

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printf("File Not Found!\n");

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// closing the file

fclose(fp);

 

return res;

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// Driver code

int main()

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char file_name[] = {"D1.txt"};

long int res = findSize(file_name);

if (res != -1)

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printf("Size of the file is %ld bytes \n", res);

if(res<=12)

{

fptr1 = fopen("D1.txt", "r");

c = fgetc(fptr1);

while (c != EOF)

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printf(c);

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}

}

return 0;

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4 0
3 years ago
PLEASE HELP!!!
Trava [24]
1/3x - 2 = 1/4x + 11....it looks to me like one y was subbed in for another...

ur 2 equations are :
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y = 1/3x - 2
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y = 1/4x + 11
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5 0
3 years ago
Say you have $14,000 to invest into an investment account. You can either invest your money into an account with a 7% annual int
taurus [48]

Answer:

You should choose an account with a 7% annual interest rate which is compounded quarterly

Step-by-step explanation:

we know that    

The compound interest formula is equal to  

A=P(1+\frac{r}{n})^{nt}  

where  

A is the Final Investment Value  

P is the Principal amount of money to be invested  

r is the rate of interest  in decimal

t is Number of Time Periods  

n is the number of times interest is compounded per year

part 1)

we have  

t=15\ years\\ P=\$14,000\\ r=0.07\\n=4  

substitute in the formula above  

A=14,000(1+\frac{0.07}{4})^{4*15}

A=14,000(1.0175)^{60}  

A=\$39,645.43  

part 2)

we have  

t=15\ years\\ P=\$14,000\\ r=0.068\\n=12  

substitute in the formula above  

A=14,000(1+\frac{0.068}{12})^{12*15}

A=14,000(1.0057)^{180}  

A=\$38,713.11  

7 0
3 years ago
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