Answer:
the answer is 8
Step-by-step explanation:
Answer:
![3.84 * 10^{9}](https://tex.z-dn.net/?f=3.84%20%2A%2010%5E%7B9%7D)
Step-by-step explanation:
![\\\\(1.2 * 10^{4}) * (3.2 * 10^{5}) = 1.2 * 3.2 * 10^{4} * 10^{5} = 3.84 * 10^{4+5} = 3.84 * 10^{9} \\\\](https://tex.z-dn.net/?f=%5C%5C%5C%5C%281.2%20%2A%2010%5E%7B4%7D%29%20%2A%20%283.2%20%2A%2010%5E%7B5%7D%29%20%3D%201.2%20%2A%203.2%20%2A%2010%5E%7B4%7D%20%2A%2010%5E%7B5%7D%20%3D%203.84%20%2A%2010%5E%7B4%2B5%7D%20%3D%203.84%20%2A%2010%5E%7B9%7D%20%5C%5C%5C%5C)
In a 30-60-90 triangle, if the short leg is x then the longer leg is x√3 and the hypotonuse is 2x
so if the rafter (hyppotnuse) is 9ft then
9ft=2x
4.5ft=1x
the short leg is 4.5ft
Answer:
x = 5.4
Step-by-step explanation:
The marked sides are the hypotenuse and the side adjacent to the marked angle. That suggests the appropriate trig function is the cosine:
Cos = Adjacent/Hypotenuse
cos(19°) = 5.1/x
x = 5.1/cos(19°) . . . . . multiply by x/cos(19°)
x ≈ 5.4