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
kotykmax [81]
1 year ago
9

10. Given that the total distance travelled is 4 km and that the initial aceleration is 4 m/s², find:a) the value of V.b) the va

lue of T.

Mathematics
1 answer:
andrezito [222]1 year ago
6 0

The initial deceleration is 4 m/s^2, so this means that considering the first line segment, \frac{V-100}{T}=-4 \implies V=100-4T.

The total distance traveled is 4 km, which is equal to 4000 meters. This is equal to the area under the graph, so 400T-\frac{1}{2}(100-V)(5T)=4000.

400(100-4T)-\frac{1}{2}(4T)(5T)=4000\\\\40000-1600T-10T^2=4000\\\\10T^2 +1600T-36000=0\\\\T^2 +160T-3600=0\\\\(T+180)(T-20)=0\\\\T=20 (T > 0)\\\\\therefore V=100-4(20)=20

You might be interested in
Does anyone know this????????
dusya [7]

Answer:

               3

       ______

    4 |       12

              -12            

              -----

                0

Step-by-step explanation:

12/4  

The top number always goes inside (larger or not), and the bottom number always goes on the outside (larger or not).

       

         ______

    4 |       12

Ask yourself how many 4's are in 12.

Let's see one 4 is just 4.

We can probably do more 4's than that.

Two 4's gives us 4+4=8.

Let's see if we can put one 4 in there.

Three 4's gives us 4+4+4=12.

So we can fit three 4's into 12 and there is nothing left over.

               3

       ______

    4 |       12

              -12                (since 4 times 3 or 4+4+4 is 12)

              -----

                0

8 0
3 years ago
PLEASE HELP ME ON THIS AND SHOW UR WORK<br> THX
swat32
When an exponential function is given as 
f(x)=ab^x, and
knowing that b^0=1, that means that
f(0)=ab^0=a  value of function when x=0, or the initial value.
In the case of
f(x)=20.b^x, f(0)=20.b^0 = 20  (initial value)

If b=1.2, then the hourly growth rate is (1.2-1)=0.2=20%.
If b=1.85, then the hourly growth rate is (1.85-1)=0.85=85%. 
4 0
3 years ago
5.
oksano4ka [1.4K]
I only know A, I’m sorry but I hope it helps.

A) because the highlighted arc is bigger than a semicircle you already know that it’s a major arc, because a minor arc will always be smaller than a semicircle.
A) Major arc
5 0
3 years ago
A recent report indicated that 22 percent of the households in a certain community speak a
Irina-Kira [14]

Answer:

16.1157

Step-by-step explanation:

7 0
2 years ago
WILL GIVE BRAINLIEST. Joanna saves nickels and quarters in a jar. If she saved five times as many nickels as quarters, and her c
vekshin1

Answer:

78 quarters

Step-by-step explanation:

I think because, I created an equation, 5x = 390 and solves to get 78

3 0
3 years ago
Other questions:
  • (-2/3) to 2nd Power - 3/4 (2 1/3)<br><br> Will give out 50+25 pts and Brainliest Answer
    11·2 answers
  • A dog eats 7 cans of dog food in 3 days at this rate how many cans of food does the dog eat in 3+ d days
    6·2 answers
  • 1. a triangle has the base of 5/3x and the height of x<br> how do i work this equation
    8·1 answer
  • If Joan read 75 pages in 4 hours how long will it take her to read 250 pages
    11·2 answers
  • Please help square root math
    9·1 answer
  • A ski lodge charges $26 per day for a pass and $1.50 for every ski lift ride. A second ski
    6·1 answer
  • Adults in Turkey have mean caloric intake of 3500 calories per day (Wikipedia) with a standard deviation of 500 calories. A samp
    8·1 answer
  • What is the A value in the quadratic: X^2+3x-2* ​
    12·1 answer
  • Can someone please help me I'm not very good at calculating slope for some reason no matter how hard I try and this equation I'v
    6·1 answer
  • state whether each expression is meaningful. if not, explain why. if so, state whether it is a vector or a scalar.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!