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
e-lub [12.9K]
3 years ago
14

równanie zmiany prędkość autokaru poruszającego się po prostym odcinku szosy i rozpoczynającego hamowanie od szybkości 20m/s ma

postać v(t)=25-5t. Korzystając z rachunku całkowego wyznacz drogę hamowania autokaru.
Mathematics
1 answer:
Rasek [7]3 years ago
3 0

Answer:

s = 22.5 m

Step-by-step explanation:

the equation for the speed change of a coach moving along a straight section of the road and starting braking at a speed of 20 m / s has the form v (t) = 25-5t. Using integral calculus, determine the coach's braking distance.

v (t) = 25 - 5 t

at t = 0 , v = 20 m/s

Let the distance is s.

s =\int v(t) dt\\\\s =\int (25 - 5t)dt\\\\s= 25 t - 2.5 t^2 \\

Let at t = t, the v = 20

So,

20 = 25 - 5 t

t = 1 s

So, s = 25 x 1 - 2.5 x 1 = 22.5 m

You might be interested in
6/10 - 1/5= Pls help
Yuki888 [10]

Answer:

2/5?

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Which is an exponential decay function f (x)=3/4 (7/4)x f (x)=2/3 (4/5)-x. F (x)=3/2 (8/7)-x f (x)=1/3 (9/2)x
dsp73
The given functions are
1.\, f(x)= \frac{3}{4}( \frac{7}{4})^{x} \\ \\2.\,f(x)= \frac{2}{3}( \frac{4}{5} ) ^{-x}\\\\3.\, f(x)= \frac{3}{2} ( \frac{8}{7} )^{-x}\\\\4.\,f(x)= \frac{1}{3} ( \frac{9}{2} )^{x}

Evaluate the functions. 
1. Because 7/4 > 1 and the exponent is positive,
   the function does not decay.
2.Because 4/5 < 1 and the exponent is negative,
    the function does not decay.
3. Because 8/7 > 1 and the exponent is negative,
    the function decays.
4. Because 9/2 > 1 and the exponent is positive,
    the function does not decay.

A composite plot the functions verifies the answer.

Answer: f(x)= \frac{3}{2} ( \frac{8}{7} )^{-x}

7 0
4 years ago
Read 2 more answers
CAN SOMEONE PLEASE HELP ME WITH THIS ITS DUE TODAY :)))
Tresset [83]
I would but I don’t know how to explain it all!
8 0
3 years ago
Read 2 more answers
Cathleen ran a total of 16 miles. She ran exactly 2 2/3 miles each day. How many days did it take her to run 16 miles
kirill [66]
It took her 6 days. 2 and 2/3 times 6 equals 16
6 0
3 years ago
Evaluate the function rule to find the range of each function for the domain {-3, 0, 5}. f(x) = x² − 6x + 4
harina [27]
Range is output for given input

domain is D={-3,0,5}
input -3,0 and 5 for x

f(-3)=(-3)^2-6(-3)+4
f(-3)=9+18+4
f(-3)=31

F(0)=(0)^2-6(0)+4

f(0)=0-0+4

f(0)=4


f(5)=(5)^2-6(5)+4

f(5)=25-30+4

f(5)=-1


Domain={-3,0,5}

Range={31,4,-1}



5 0
3 years ago
Other questions:
  • A random variable is normally distributed with a mean of 25 and a standard deviation of 5. if an observation is randomly selecte
    9·1 answer
  • The surface of water can act like a sort os skin due to a property of liquids called
    7·1 answer
  • Write 63 as a sum of tens and ones
    8·1 answer
  • PLEASE HELP 65points!!! <br> Evidence for the work
    14·2 answers
  • Forbes reports that women trust recommendations from Pinterest more than recommendations from any other social network platform
    15·1 answer
  • The volume of a cube depends on the length if its side . this can be wtitten in function as v(2)=8?
    11·2 answers
  • Alex draws a diagonal in a rectangle that is 4 inches long and 3 inches wide. What is the area of one of two triangles that are
    7·1 answer
  • Marla made an error when solving the equation shown. What was her error ,and how should she fix it?
    8·1 answer
  • Find the Slope of the line
    8·2 answers
  • Which of the following is the graph of x^2&lt;16?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!