Answer:
d = 3
Step-by-step explanation:
6*3=18
2d*6=12d
54-18 = 12d
36/12 = 12d/12
d = 3
Answer:
The plane's distance from the radar station will increase about 8 miles per minute when it is 5 miles away from it.
Step-by-step explanation:
When the plane passes over the radar station, the current distance is the altitude h = 2. Then it moves b horizontally so that the distance to the station is 5. We can form a rectangle triangle using b, h and the hypotenuse 5. Therefore, b should satisfy
h²+b² = 5², since h = 2, h² = 4, as a result
b² = 25-4 = 21, thus
b = √21.
Since it moved √21 mi, then the time passed is √21/540 = 0.008466 hours, which is 0.51 minutes. Note that in 1 minute, the plane makes 540/60 = 9 miles.
The distance between the plane and the radar station after x minutes from the moment that the plane passes over it is given by the function
![f(x) = \sqrt{((9x)^2 + 2^2)} = \sqrt{(81x^2+4)}](https://tex.z-dn.net/?f=f%28x%29%20%3D%20%5Csqrt%7B%28%289x%29%5E2%20%2B%202%5E2%29%7D%20%3D%20%5Csqrt%7B%2881x%5E2%2B4%29%7D)
We have to compute the derivate of f in x = 0.51. The derivate of f is given by
![f'(x) = \frac{162x}{2\sqrt{81x^2+4}}](https://tex.z-dn.net/?f=f%27%28x%29%20%3D%20%5Cfrac%7B162x%7D%7B2%5Csqrt%7B81x%5E2%2B4%7D%7D)
also,
![f'(0.51) = \frac{162*0.51}{2\sqrt{81*0.51^2+4}} = 8.2486](https://tex.z-dn.net/?f=f%27%280.51%29%20%3D%20%5Cfrac%7B162%2A0.51%7D%7B2%5Csqrt%7B81%2A0.51%5E2%2B4%7D%7D%20%3D%208.2486)
The plane's distance from the station will increase about 8 miles per minute.
1 3 6 concrete ratio
Concrete
Proportions by Cement No. of 50 kg Sand to total aggregate
1:3:6 4.0 31
1:4:5 4.0 41
1:3:5 4.4 35
1:4:4 4.5 47
Answer:
1 orange, apple 1 3/5, blueberries 1 1/4, peaches 1 7/9
Step-by-step explanation: