Answer:
The stopping distance for a car traveling 40 mph is 240 feet.
Step-by-step explanation:
We are given the following in the question:
The stopping distance (s) of a car varies directly as the square of its speed (v)
Removing the sign of proportionality and adding constant of proportionality, we get
where k is constant of proportionality.
Now, when s = 60 feet, v = 20 mph
Putting values, we get,
Putting value of k in the equation, we get,
We have to find the stopping distance for a car traveling 40 mph.
Thus, the stopping distance for a car traveling 40 mph is 240 feet.
2(3x-2)>_22
Answer:
9 cm
Step-by-step explanation:
c^2=81
Take the square root of both sides.
The square root of c^2 is c.
The square root of 81 is 9.
c=9
Answer:
C = 9 centimeters
Step-by-step explanation:
First, look at the area of a square, which formula is c^2 or in standard format - s^2. Thus, we can say, c^2 = 81. Then, we can simplify, and put c = √81. Since 81 is a perfect square, 9 * 9 = 81. Thus the answer is 9 centimeters.