Answer:
yes they are
Step-by-step explanation:
Proportional relationships are relationships between two variables where their ratios are equivalent. Another way to think about them is that, in a proportional relationship, one variable is always a constant value times the other. That constant is know as the "constant of proportionality".
It's answer D, each unit costa $2.50
<span>0.18181818181 or 0.18 with a line above 18</span>
Answer:
14
Step-by-step explanation:
Order of operations rules require that we do any work inside parentheses first. Thus,
–(31 + 2) + 72 – (–5)^2
becomes:
-33 + 72 - 25, or
14
Important: Please use " ^ " to denote exponentiation; (-5)2 is incorrect, whereas (-5)^2 or (-5)² is correct.
Answer:
24,429.0245 square units
Step-by-step explanation:
The volume of a sphere can be found using the following formula.
![V=\frac{4\pi r^3}{3}](https://tex.z-dn.net/?f=V%3D%5Cfrac%7B4%5Cpi%20r%5E3%7D%7B3%7D)
The radius is 18 units. Therefore, we can substitute 18 units in for r.
![V=\frac{4\pi (18units)^3}{3}](https://tex.z-dn.net/?f=V%3D%5Cfrac%7B4%5Cpi%20%2818units%29%5E3%7D%7B3%7D)
First, evaluate the exponents.
18 units^3= 18 units * 18 units * 18 units= 5832 units^3
![V=\frac{4\pi (5832 units^3)}{3}](https://tex.z-dn.net/?f=V%3D%5Cfrac%7B4%5Cpi%20%285832%20units%5E3%29%7D%7B3%7D)
Multiply 4 and pi.
![V=\frac{12.5663706*5832 units^3}{3}](https://tex.z-dn.net/?f=V%3D%5Cfrac%7B12.5663706%2A5832%20units%5E3%7D%7B3%7D)
Multiply in the numerator.
![V=\frac{73287.0733 units^3}{3}](https://tex.z-dn.net/?f=V%3D%5Cfrac%7B73287.0733%20units%5E3%7D%7B3%7D)
Divide
![V=24429.0245 units^3](https://tex.z-dn.net/?f=V%3D24429.0245%20units%5E3)
The volume of the sphere is 24,429.0245 units^3