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natulia [17]
2 years ago
15

If you add 8 g of salicylic acid to 84 g of an ointment base what is the final concentration of the product

Mathematics
1 answer:
Anastaziya [24]2 years ago
3 0

Answer:

concentration = 8/84 + 8 = 0.8696

Step-by-step explanation:

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a farmer is buying fencing to surround a square field of area 3600m^2. What length of fencing does he need to buy?
kirill115 [55]

Answer:

240 m

Step-by-step explanation:

The area of a square field is 3600 m².

We need to find the length of fencing he needs to buy. It means we need to find the perimeter of the field.

The area of a square field is given by :

A = side²

So,

s=\sqrt{3600} \ m\\\\s=60\ m

Length of fencing = perimeter

= 4(s)

= 4(60)

= 240 m

So, he would need to buy 240 m of fencing.

8 0
3 years ago
The perimeter of ABCD is 66 and DC is twice as long as CB how long is a B
Natali5045456 [20]
<span>Length = x Width = 2x
Perimeter = 2 * length + 2 * width
= 2x + 4x
= 6x 
6x = 66
x = 11 
</span><span>Length = x Width = 2x
Perimeter = 2 * length + 2 * width
= 2x + 4x
= 6x 
6x = 66
x = 11</span>
3 0
3 years ago
The formula K=59 (F−32)+273.15
anyanavicka [17]
<span> Slope = 0.034/2.000 = 0.017 
k-intercept = -32297/20 = -1614.85000<span> 
f-intercept = 32297/1180 = 27.37034</span></span>
5 0
3 years ago
The area of a rectangle is 72 square units. If its width is 4 units, find the length.
ludmilkaskok [199]
The area is 288 units squared, or D. 72 times 4 equals 288.
8 0
3 years ago
Factor completely: <br><br> A) 64x²-49y²<br> B) 20x²-45y²
tigry1 [53]

Use\\a^2-b^2=(a-b)(a+b)\\(ab)^n=a^nb^n\\(\sqrt{a})^2=a\ for\ a\geq0\\------------------------------\\A)\ 64x^2-49y^2=8^2x^2-7^2y^2=(8x)^2-(7y)^2=(8x-7y)(8x+7y)\\\\B)\ 20x^2-45y^2=(\sqrt{20})^2x^2-(\sqrt{45})^2y^2=(*)\\\\\sqrt{20}=\sqrt{4\cdot5}=\sqrt4\cdot\sqrt5=2\sqrt5\\\sqrt{45}=\sqrt{9\cdot5}=\sqrt9\cdot\sqrt5=3\sqrt5\\\\(*)=(2\sqrt5x)^2-(3\sqrt5y)^2=(2\sqrt5x-3\sqrt5y)(3\sqrt5x+3\sqrt5y)

or:\\\\20x^2-45y^2=5\cdot4x^2-5\cdot9y^2=5(4x^2-9y^2)=5[(2x)^2-(3y)^2]\\\\=5(2x-3y)(2x+3y)

3 0
3 years ago
Read 2 more answers
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