Answer:
<em>The sea cow can stay under water for 16 minutes.</em>
Step-by-step explanation:
A hippopotamus can stay under water for 15 minutes.
A sea cow can stay under water
minutes and this is 11 minutes longer than one-third the time a hippopotamus can.
So, "11 minutes longer than one-third the time a hippopotamus can" means: ![[\frac{1}{3}(15)+11] minutes](https://tex.z-dn.net/?f=%5B%5Cfrac%7B1%7D%7B3%7D%2815%29%2B11%5D%20minutes)
Thus, the equation will be: ![y= \frac{1}{3}(15)+11](https://tex.z-dn.net/?f=y%3D%20%5Cfrac%7B1%7D%7B3%7D%2815%29%2B11)
Now, solving the above equation, we will get.........
![y= \frac{1}{3}(15)+11 \\ \\ y=5+11= 16](https://tex.z-dn.net/?f=y%3D%20%5Cfrac%7B1%7D%7B3%7D%2815%29%2B11%20%5C%5C%20%5C%5C%20y%3D5%2B11%3D%2016)
So, the sea cow can stay under water for 16 minutes.
1. D; -5m+2m, because -5+2=-3
2. B; 4 terms, every part of an expression that's not the subtraction/addition sign counts as a term.
3. Not 100% sure about this one, but I'll go with B; 4x².
4. C; 5b, that term cannot be combined because the variable is different from the rest.
I hope this was helpful.
The ratio of the side of the square to the radius is equal to
.
<h3>
How to find the ratio of two lines</h3>
In this question we must construct first a <em>geometric</em> diagram with all <em>geometric</em> figures explained in statement. By Pythagorean theorem we have the following relationship between the side length of the square (
) and the circle radius (
):
(1)
![r^{2}=1.25\cdot l^{2}](https://tex.z-dn.net/?f=r%5E%7B2%7D%3D1.25%5Ccdot%20l%5E%7B2%7D)
![\frac{l}{r} = \sqrt{\frac{4}{5} }](https://tex.z-dn.net/?f=%5Cfrac%7Bl%7D%7Br%7D%20%3D%20%5Csqrt%7B%5Cfrac%7B4%7D%7B5%7D%20%7D)
![\frac{l}{r} = \frac{2}{5}\cdot \sqrt{5}](https://tex.z-dn.net/?f=%5Cfrac%7Bl%7D%7Br%7D%20%3D%20%20%5Cfrac%7B2%7D%7B5%7D%5Ccdot%20%5Csqrt%7B5%7D)
The ratio of the side of the square to the radius is equal to
. ![\blacksquare](https://tex.z-dn.net/?f=%5Cblacksquare)
To learn more on ratios, we kindly invite to check this verified question: brainly.com/question/1504221
You need to sell 16.24 / 1.32 = 12.3 meals. However, since you can't sell "0.3" meals, you actually need to sell 13 meals in order to break-even on the plates.