This one's simple..
B) -8 units
Answer:
B
Step-by-step explanation:
I think your supposed to just count the dots
Check the picture below.
if you go from the slant height, the path is shorter to the top, since the hypotenuse is the longest of all sides in a right-triangle.
that said, is shorter but is also steeper, so the lateral edge is longer but less steep and thus a bit simpler though longer, but we're only asked on which is shorter.
Answer:
2nd car is running faster than the first car by 2.01 units.
Step-by-step explanation:
Let's assume that
- the velocity of first car,
![v_1\ =\ 20i\ +\ 25j](https://tex.z-dn.net/?f=v_1%5C%20%3D%5C%2020i%5C%20%2B%5C%2025j)
- and the velocity of second car
![v_2\ =\ 30i](https://tex.z-dn.net/?f=v_2%5C%20%3D%5C%2030i)
=> speed of first car,
![u_1\ =\ \sqrt{(20)^2+(25)^2}](https://tex.z-dn.net/?f=u_1%5C%20%3D%5C%20%5Csqrt%7B%2820%29%5E2%2B%2825%29%5E2%7D)
![=\ \sqrt{400+625}](https://tex.z-dn.net/?f=%3D%5C%20%5Csqrt%7B400%2B625%7D)
![=\ \sqrt{1025}](https://tex.z-dn.net/?f=%3D%5C%20%5Csqrt%7B1025%7D)
= 32.01 units
and speed of second car,
![u_2\ =\ \sqrt{(30)^2+(0)^2}](https://tex.z-dn.net/?f=u_2%5C%20%3D%5C%20%5Csqrt%7B%2830%29%5E2%2B%280%29%5E2%7D)
= 30 units
![u_2\ -\ u_1\ =\ 32.01\ -30](https://tex.z-dn.net/?f=u_2%5C%20-%5C%20u_1%5C%20%3D%5C%2032.01%5C%20-30)
= 2.01 units
Hence, 2nd car is running faster than the first car by 2.01 units.