Answer:
2
Step-by-step explanation:
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A scale factor would be the side of the first triangle over the corresponding side of the resulting triangle.
Answer:
52.24 km
Step-by-step explanation:
Given that,
The distance needed to stop a car, d, varies directly as the square of the speed, s, at which it is travelling.
d = ks²
Where
k is constant
When s₁ = 70 km/hr, d₁ = 40 m, s₂ = 80 km/hr, d₂ = ?
So,
![\dfrac{d_1}{d_2}=\dfrac{s_1^2}{s_2^2}\\\\d_2=\dfrac{d_1s_2^2}{s_1^2}\\\\d_2=\dfrac{40\times 80^2}{70^2}\\\\d_2=52.24\ km](https://tex.z-dn.net/?f=%5Cdfrac%7Bd_1%7D%7Bd_2%7D%3D%5Cdfrac%7Bs_1%5E2%7D%7Bs_2%5E2%7D%5C%5C%5C%5Cd_2%3D%5Cdfrac%7Bd_1s_2%5E2%7D%7Bs_1%5E2%7D%5C%5C%5C%5Cd_2%3D%5Cdfrac%7B40%5Ctimes%2080%5E2%7D%7B70%5E2%7D%5C%5C%5C%5Cd_2%3D52.24%5C%20km)
So, the new distance is 52.24 km.