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saw5 [17]
3 years ago
12

Can someone plz help me with this

Mathematics
2 answers:
ElenaW [278]3 years ago
5 0

Answer: 105

Step-by-step explanation:

it counts by 5

Ronch [10]3 years ago
3 0
The line is right in the middle of 100 and 110 degrees so the answer should be 105 degrees. This tool is called a protractor. :)
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Solute S has a partition coefficient of 5.9 between water (phase 1) and hexane (phase 2).
igor_vitrenko [27]

Answer:

(a) 0.0885 M

(b) 1.25

Step-by-step explanation:

Solute S has a partition coefficient of 5.9 between water (phase 1) and hexane (phase 2).

i.e Partition coefficient Kd = [S(hexane]/[S(water) = 5.9

to  calculate the concentration of S in hexane; we have;

[S(hexane]/0.015 = 5.9

[S(hexane)] = 5.9 x 0.015

= 0.0885 M

Question B say ,

If the volume of water is 85.0 mL

and the volume of hexane is 18.0 mL,

to find the quotient (mol S in hexane/mol S in water), we will multiply the

Partition coefficient Kd with volume of hexane divided  by volume of water

i.e Partition coefficient Kd = (moles/volume of S in hexane)/(moles/volume of S in water)

∴

(moles of S in hexane/moles of S in water) = Kd x (volume of hexane/volume of water)

= 5.9 x 18.0/85.0

= 1.25

5 0
3 years ago
Write the equation of the line given the following. Write the equation in slope-intercept form.
Elis [28]
Just to get formulas out the way so that I don't have to write them out every time:

slope-intercept form: y = mx + b
where m is the slope and b is the y-intercept.

slope = \frac{Y2-Y1}{X2-X1}
where X1 and Y1 are the x- and y-coordinates in the first ordered pair. Same applies for X2 and Y2.

1) They give you the slope so plug it in along with the point given and solve for b. 

y = 2/5x + b
- 6 = 2/5(- 1) + b
- 6 = - 2/5 + b
- 6 + 2/5 = b
- 30/5 + 2/5 = b
- 28/5 = b

Your equation: y = - 2/5x - 28/5

2) Find your slope first then plug in any point to solve for b.
m = \frac{8 - 5}{5 - (- 2)} =  \frac{3}{7}

y = 3/7x + b
5 = 3/7(- 2) + b
5 = - 6/7 + b
5 + 6/7 = b
35/7 + 6/7 = b
41/7 = b

y = 3/7x + 41/7

3) Same thing as above. 
m = \frac{7 - 7}{5 - (- 3)} =  \frac{0}{8} = 0

y = 0x + b
y = b
7 = b

y = 7

4) Same as above
m = \frac{- 5- 1}{6-6} =  \frac{- 6}{0} = undefined. 

Because your slope is undefined, it is no longer a "y =" problem but rather an "x =" equation. You then take the x-values of the two ordered pairs (they should match) and that becomes the right side of the equal sign.

x = 6
3 0
3 years ago
The price of a technology stock has dropped to $9.61 today. Yesterday's price was $9.74. Find the percentage decrease.
Lemur [1.5K]

Answer:

1.33%

Step-by-step explanation:

$9.74 - $9.61 = $0.13

(0.13 divided by $9.74) times 100

=1.33%  

4 0
3 years ago
The frequency (f) of the note produced by striking a pipe of length (L) and radius (r) is given by f = 2r + c over 2L where c is
Luba_88 [7]

Now the aim of the above discussion is to internalize the mathematical relationships for open-end air columns in order to perform calculations predicting the length of air column required to produce a given natural frequency. And conversely, calculations can be performed to predict the natural frequencies produced by a known length of air column. Each of these calculations requires knowledge of the speed of a wave in air (which is approximately 340 m/s at room temperatures). The graphic below depicts the relationships between the key variables in such calculations. These relationships will be used to assist in the solution to problems involving standing waves in musical instruments.

8 0
3 years ago
A socket set is an integral part of a technician's tool box because ____. A. the extension allows easier access to nuts/bolts in
Ann [662]

Answer: C

Explanation:

. there are multiple sockets that can be interchanged easily to accommodate many different size nuts and bolts

8 0
3 years ago
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