1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
morpeh [17]
3 years ago
7

The braking distance, D, of a car is directly proportional to the square of its speed, v. When d=5, v=10

Mathematics
1 answer:
elena-s [515]3 years ago
3 0

d \propto  v^2

$\implies d=kv^2$

substitute the given values, $5=k(10)^2\implies k=\frac1{20}$

now, $d=\frac{1}{20}\times( 70)^2=\frac{70\times70}{20}=245$

A big blunder from my side, now fixed!

You might be interested in
What is the square root of -1
Gre4nikov [31]

Answer:

i

Step-by-step explanation:

because you can't technically can't find the square root of -1, so it's an imaginary number

4 0
3 years ago
A park ranger would like to clear more than 10 mi of trail. So far, he has cleared 2 mi. From now on, he can clear 3/4 mi of tra
blondinia [14]

Answer: The answer is (b) The ranger will need to clear trail for more than 10 2/3 additional hours.


Step-by-step explanation:  Given that a park ranger would like to clear more than 10 mi of trail. Till now, he has cleared 2 mi. From now on, he can clear 3/4 mi of trail each hour.

Since 2 mi of the trail has already been cleared, so the trail that is left to be cleared = 10 - 2 = 8 mi.

Let, the park ranger will work for 'x' more hours. So, we have

\dfrac{3}{4}\times x=8\\\\\Rightarrow 3x=32\\\\\Rightarrow x=\dfrac{32}{3}\\\\\Rightarrow x=10\dfrac{2}{3}.

Thus, the park ranger will need to work for 10 2/3 more hours.

Hence, the correct option is (b) The ranger will need to clear trail for more than 10 2/3 additional hours.


3 0
3 years ago
Read 2 more answers
Please help with answers
Artyom0805 [142]
1).  The inequality says "height is 54 or more".
Any height that is less than 54 does NOT qualify.

2).  The sign says  "Maximum total weight 800 pounds".
Any weight that's 800 pounds or less is OK.

3).  Paula has scored 21, 25, and 15 points.
. . . . . they're NOT all greater than 21
. . . . . they ARE all 25 or less
. . . . . they ARE all less than 30
. . . . . they ARE all 10 or more .

4).  First, write down the number of cans that
each student collected, but arrange them in order.
Then check each choice.
A).  misses the highest 3 students completely
B).  includes everybody
C).  misses the lowest 3 students completely
D).  OK, but the first and last intervals aren't needed,
       because nobody's cans are in those intervals
3 0
3 years ago
Mark got 14 problems wrong on his test. His score was 72% correct. How many problems were on the test? Please show work.
stira [4]
Consider that 100%-72%=28% represents the percentage of wrong answers. I would think as fractions as:
if 100%  is the total number of answers and 28% are the wrong ones
as
if x is the total you have 14 wrong you can write:
\frac{100}{28} = \frac{x}{14}
x=(100/28)*14=50 questions
7 0
3 years ago
For a linear system in two variables, in which form do you want your equations in so you can easily graph them?
Natalija [7]
Slope intercept form i think
8 0
2 years ago
Other questions:
  • Which is a solution for the following system of inequalities?
    15·1 answer
  • If 1 pound is $0.32 then how much does 3.4 pound cost
    11·1 answer
  • Koji is installing a rectangular window in an office building. The window is 8 2/3 feet wide and 5 3/4 feet high.
    14·1 answer
  • Find c to two decimal places and find the measure of angle B. Angle A = 58°, Side AC = 5, Side BC = 8, Find side C. Angle C is 9
    10·1 answer
  • Select the correct translation for the following function:<br><br> g(x) = f(x + 8)
    13·2 answers
  • What is the equation for a line that has a slope of -1 and a y-intercept of -7?
    6·1 answer
  • 6(x-2)= -18 find what x equals
    15·2 answers
  • 1. h-4w when h =17 and w = 2
    10·1 answer
  • Which is an example of volume?
    15·2 answers
  • Determine if the expression 8a – a4 is a polynomial or not. If it is a polynomial,
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!