“The breaking distance is directly proportional to the square of its speed”
Using your variables, this means: d = k•b^2
k here is some unknown (and for this question irrelevant) number.
Now if b (the speed) is increased by 200%, then your new speed is b+2b = 3b. The 2b is the 200% increase.
Throw 3b into the first equation we have the new d as:
d = k • (3b)^2
Simplifying this, you have d = k•9b or d=9kb
This means the new braking distance is 9 times the original braking distance.
Answer:
Option D
Step-by-step explanation:

- You have to first find 4^x and then multiply it with two .
Not like this
(×)
Hence the variable has coefficient 4 as 4^x is multiplied.
Answer:
Expression is 2(l+w)
Step-by-step explanation:
l is length and w is width
<span>20 Cups = 160 Fluid Ounces
</span><span>20 cup = 10 pint US, liquid
</span><span>20 cup = 5 quart US, liquid</span>