Answer:
Only A. a=3
Step-by-step explanation:
Because since 7+a<11 then that means a have to be 3 or below... good luck!
Answer:
![r = 1.6](https://tex.z-dn.net/?f=r%20%3D%201.6)
Step-by-step explanation:
Given
x ----- y
0.5. --- 0.8
1. --- 1.6
3.--- 4.8
25. --- 40
Required
Determine the constant of proportionality
This can be calculated using the following formula:
; Where r is the constant of proportionality;
Solve for r
![r = \frac{y}{x}](https://tex.z-dn.net/?f=r%20%3D%20%5Cfrac%7By%7D%7Bx%7D)
When x = 0.5; y = 0.8
![r = \frac{0.8}{0.5}](https://tex.z-dn.net/?f=r%20%3D%20%5Cfrac%7B0.8%7D%7B0.5%7D)
![r = 1.6](https://tex.z-dn.net/?f=r%20%3D%201.6)
When x = 1; y =1.6
![r = \frac{1.6}{1}](https://tex.z-dn.net/?f=r%20%3D%20%5Cfrac%7B1.6%7D%7B1%7D)
![r = 1.6](https://tex.z-dn.net/?f=r%20%3D%201.6)
When x = 3; y = 4.8
![r = \frac{4.8}{3}](https://tex.z-dn.net/?f=r%20%3D%20%5Cfrac%7B4.8%7D%7B3%7D)
![r = 1.6](https://tex.z-dn.net/?f=r%20%3D%201.6)
When x = 25; y = 40
![r = \frac{40}{25}](https://tex.z-dn.net/?f=r%20%3D%20%5Cfrac%7B40%7D%7B25%7D)
![r = 1.6](https://tex.z-dn.net/?f=r%20%3D%201.6)
Notice that the value of r is constant throughout;
Hence:
![r = 1.6](https://tex.z-dn.net/?f=r%20%3D%201.6)
The other two angles are each 76 degrees because a triangle has 180 degrees total minus the 28 divided by the two angles left.
4 2 inch cubes are needed to fill the cubic box