1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
sergij07 [2.7K]
3 years ago
7

A laboratory technician needs to make a 40-liter batch of a 40% acid solution. how can the laboratory technician combine a batch

of an acid solution that is pure acid with another that is 20% to get the desired concentration? 
Mathematics
1 answer:
Kobotan [32]3 years ago
5 0
You need to do is 40 times 40%
You might be interested in
5. Two shelves are on a wall with one directly above the other. One shelf is 4 5/6 feet above the floor and the other is 5% 9/10
Levart [38]
5 9/10 - 4 5/6 = (5x10+9)/10 - (4x6+5)/6 = 59/10 - 29/6 = 177/30 - 145/30 = 32/30 = 1 1/15 feet apart
5 0
2 years ago
The circumference of a circular hot tub at a hotel is 56.5 yards. What is the diameter of the hot tub?
Scorpion4ik [409]

c = 2\pi \times r \\ 56.5 \div 2 = \pi \times r \\ 28.25 \div \pi = r \\ 9 = r \: then \:  \times 2 = d \:  \\ diameter \: is \: 18
7 0
3 years ago
Help is greatly appreciated:)
Murrr4er [49]
Well there are 6 units down and 11 units across so 6•11=66. there are 14 red units. 66-14=52. the area of yellow is 52.
4 0
2 years ago
Solve the given equation. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to two decimal places
Leya [2.2K]

Answer:

  θ = {(4/3 +2k)π, (5/3 +2k)π}

Step-by-step explanation:

From your knowledge of trig functions, you know that sin(60°) = sin(π/3) = (√3)/2. So, the angles of interest are in the 3rd- and 4th-quadrant and will have π/3 as their reference angle.

  θ = 4/3π +2kπ, and 5/3π +2kπ

7 0
2 years ago
Eric made a drawing of his rectangular bedroom with the scale 1 inch = 3 feet. The drawing was 5 inches long by 4 inches wide. W
allochka39001 [22]

Answer:   180 square feet

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • PLEASE ANY HELP IT POSSIBLE THANK YOU VERY MUCH ❤
    11·1 answer
  • If Ben eats 2/5 of a packet of crisps everyday. how much will he eat in 30 days?
    13·2 answers
  • Help with number 4 and number 7 please
    7·1 answer
  • A line segment has endpoints at (4.-6) and (0,2).
    7·2 answers
  • Pleaseeeeeeeeeee help.
    5·1 answer
  • Simplify the expression.
    9·1 answer
  • ASAP PLEASE
    8·2 answers
  • Please help a girl out I'm so confused
    7·2 answers
  • In a 30°-60°-90° triangle, the length of the hypotenuse is 30. Find the length of the shorter leg.
    13·2 answers
  • Find an equation for the line that passes through the points (-6, -6) and (4,-2)
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!