First put it in standard form:
<span>x^2 −14x -15 =0
a =1 b =-14 c=-15
Then use the quadratic formula:
x = [-b +-sq root (b^2 - 4ac)] / 2a
x = [--14 +- sq root (14^2 -4*1*-15] / 2*1
x = [14 +-sq root (196 +60)] / 2
</span><span>x = [14 +- 16] / 2
x1 = 15
x2 = -1
</span>
the number of moles in a liter is 0. 045 moles
<h3>What is mole?</h3>
Mole, in chemistry, is known as a standard scientific unit used for measuring large quantities or amounts of very small entities such as atoms, molecules, or other specified particles.
It is important to note that the number of units in a mole is also called its Avogadro’s number
The basis for the conversion of moles to liters is
1mol = 22.4Liter
Hence,
If 1 mol = 22. 4Liter
Then x mol = 1Liter
Cross multiply
x × 22. 4 = 1 × 1
22. 4x = 1
Divide through by 22.4
x = 1/ 22. 4
x = 0. 045 moles
Thus, the number of moles in a liter is 0. 045 moles
Learn more about moles here:
brainly.com/question/14464650
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Answer:
13.89 ft³
Step-by-step explanation:
The volume of a rect. prism is BxWxH. since you're looking for unfilled it's a little but tricky-er.
You know that the tank already has 1/3 ft deep water, so you take 1/3 off the height.
now you have
5 x 1 2/3 x 1 2/3
8 1/3 x 1 2/3
13 8/9 or 13.888888 or ~13.89
so
13.89 ft³
I also haven't done a problem like that in 1-2 years so tell me if I got it wrong
The answer is C
Hope this helps!!
Answer:
all squares are quadrilaterals