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Over [174]
2 years ago
7

George wishes to increase the percent of acid in 50 ml of a 15% acid solution in water

Mathematics
2 answers:
PtichkaEL [24]2 years ago
3 0

Answer:

screw this question

Step-by-step explanation:

To change from 15% to 25% he needs to add 10%.

If the solution is 50ml then he needs to add 10% which is 5ml... But if he adds 5 ml then the solution will be 55ml total, so that doesn't make sense. He has to take some of the solution that's not acid before adding the 5ml...

sammy [17]2 years ago
3 0

Answer:

20/3 ml

Step-by-step explanation:

Original solution volume is 50ml out of which 15% is acid

Vol of acid in solution = 15% x 50 = 7.5 ml

Let's add X ml of acid to solution so that acid % is 25%

New acid volume = X + 7.5

New solution volume = X + 50

Using ratio of acid/solution gives us (X+7.5)/(X+50) = 25/100

or,

(X + 7.5)/(X+50) = 1/4

Cross-multiplying

4(X+7.5) = X + 50

4X + 30 = X + 50

3X = 20

X = 20/3  ANS

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The formula P=0.6x-89 models the profit, P, in dollars, for a shoe shiner when he shines x pairs of shoes.Use the formula to fin
yanalaym [24]

Answer:

do you still need help

Step-by-step explanation:

8 0
2 years ago
Suppose you begin a job with an annual salary of $32,900. Each year you are assured of a 5.5% raise. What its the total amount t
olga2289 [7]

Answer: the total amount that you can earn in 15 years is $737245. Option C

Step-by-step explanation:

You receive an annual salary of $32,900 and each year, you are assured of a 5.5% raise. Assuming there was no raise, you get 100% of your previous salary each year. With a raise of 5.5%, you will get 100 + 5.5 = 105.5% of your previous salary for each year. This is a geometric progression and we want to determine the sum of 15 terms(15 years).

The formula for the sum of terms in a geometric progression is

Sn = [a(r^n - 1)]/ r - 1

Sn = sum of n terms

a = the first term

n = number of terms

r = common ratio

From the information given,

a = 32900

n = 15

r = 105.5/100 = 1.055

S15 = [32900(1.055^15 - 1)] / 1.055 - 1

S15 = [32900(2.23247649 - 1)] / 0.055

S15 = 32900 × 1.23247649) / 0.055

S15 = 737245.0277

S15 = $737245

4 0
3 years ago
PLEEEEEEEEEEEASE HELP
Artemon [7]

Step-by-step explanation:

5f

5 + n times of a number

3 0
2 years ago
Solve for X. Round to the nearest 10th. Need to use COS, TAN, or SIN
Brums [2.3K]

tan( 75 ) = 17 / x

3.732 = 17 / x

x = 17 / 3.732

x = 4.5551

x = 4.56

7 0
3 years ago
If triangle ABC is congruent to triangle DEF, which statement is not true?
ArbitrLikvidat [17]
The answer would be b.) angle C is congruent to angle E. 
Hope this helps
3 0
3 years ago
Read 2 more answers
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