Answer:
w = 36 cm
L = 27 cm
Step-by-step explanation:
I am translating and I see that perimeter of rectangle is 126 cm and the base (assuming Length) is (3/4) the height.
P = 2(l+w)
Divide both sides by 2, so you get
(3/4)w+(4/4)w=(126/2)
(7w/4)=63
Multiply both sides by 4,
7w=252, then divide both side by 7,
w = 36, Width is 36 cm, so Length is (3/4), which is L = 27 cm
First we write the mathematical model in a generic way:
"The stopping distance of an automobile is directly proportional to the square of its speed v"
d = kv ^ 2
Where,
k: proportionality constant.
We now look for the value of K:
d = kv ^ 2
90 = k ((70) * (5280/3600)) ^ 2
k = 90 / ((70) * (5280/3600)) ^ 2
k = 0.008538539 s ^ 2 / feet
The equation will then be:
d = (0.008538539) * v ^ 2
For v = 71 miles per hour we have:
d = (0.008538539) * ((71) * (5280/3600)) ^ 2
d = 92.6 feet
Answer:
a mathematical model that gives the stopping distance in terms of its speed v is:
d = (0.008538539) * v ^ 2
The stopping distance if the brakes are applied when the car is traveling at 71 miles per hour is:
d = 92.6 feet
Answer:
its c
Step-by-step explanation:
if u add 69 plus ur mom u get it
