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SashulF [63]
2 years ago
12

A Laboratory technician needs to make a 81-liter batch of a 20% acid solution. How can the laboratory technician combine a batch

of an acid solution that is pure acid with another that is 10% to get the desired concentration
Mathematics
1 answer:
8090 [49]2 years ago
3 0

Answer:

You would need 9 liters of pure acid and 72 liters of 10% acid to make a mixture of of 81 liters of 20% acid.

Step-by-step explanation:

See attached picture.

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-30=q-10+11q<br><br> Pls help me answer this
Leno4ka [110]
Combine q terms
-30 = 12q - 10
Add 10 to both sides
-20 = 12q
Simplify
Q = -5/3
5 0
3 years ago
If the diameter of a volleyball is 15.5 find its radius and volume​
WITCHER [35]

Answer:

Radius: 7.75

Volume: 1949.82

Step-by-step explanation:

The radius is half the diameter, so 15.5/2 is 7.75

The formula for a sphere is V=4/3 (πr^3). All that needs to be plugged in is the radius. You should be able to use a calculator for this problem, so the rounded answer is 1949.82.

6 0
3 years ago
Find the value of x and y
natita [175]

Answer:

Step-by-step explanation:

This are similar triangle

<ABD = <ACE

CE/BD = AE/AD

33/11 = 15/AD

Let AD be x

33/11 = 15/x

Cross multiply

33x = 11×15

33x = 165

x = 165/33

x = 5

AE = AD + DE

AE = 15, AD = x = 5 and DE = y

: 15 = 5 + y

y = 15 - 5

y = 10

BD/CE = AB/AC

11/33 = 9/(x+9)

Cross multiply

11(x+9) = 9(33)

11x + 99 = 297

11x = 297 - 99

11x = 198

x = 198/11

x = 18

6 0
3 years ago
What is the value of e in e^x
Nookie1986 [14]

Answer

approximately 2.718

Step-by-step explanation

The exponential constant is an important mathematical constant and is given the symbol e. Its value is approximately 2.718. It has been found that this value occurs so frequently when mathematics is used to model physical and economic phenomena that it is convenient to write simply e.

7 0
3 years ago
-6+7x=29 solve for x
Neko [114]

Answer:

x=5

Step-by-step explanation:

add 6 to both sides

7x=35

divide by 7

x=5

6 0
3 years ago
Read 2 more answers
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