Answer:
The length of a is 3 units
And breadth of a is 1 units
The length of b is 9 units and the Breadth of b is 3 units.
Therefore, Ratio of their sides=1:3.
Therefore, Scale os 1:3
This can be solved using the pythagorean theorem. The theorem is shown below:
c^2 = a^2 + b^2
The hypotenuse is c, so substituting the given values:
c^2 = (5)^2 + 12^2
c^2 = 25 + 144
c = sqrt(169)
c = 13
Therefore, the correct answer is B. 13 cm.
X - 26000 - .06(26000) = 11,600
x - 26,000 - 1560 = 11,600
x - 27560 = 11,600
x = 11,600 + 27,560
x = 39,160 <== selling price
Before the driver applies the brakes ( with the reaction time ):
d 1 = v0 · t = 20 m/s · 0.53 s = 10.6 m
After that:
v = v0 - a · t1
0 = 20 m/s - 7 · t1
7 · t1 = 20
t1 = 2.86 s
d 2 = v 0 · t1 - a · t1² / 2
d 2 = 20 m/s · 2.86 s - 7 m/s² · (2.86 s)²/2 = 57.2 m - 28.6 m = 28.6 m
d = d 1 + d 2 = 10.6 m + 28.6 m = 39.2 m
Answer: the stopping distance of a car is 39.2 m.