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
trapecia [35]
3 years ago
14

If the distance covered by an object in time t is given by s(t)=2t^2+3t , where s(t) is in meters and t is in seconds, what is t

he average velocity over the interval from 2 seconds to 4 seconds?
Answers:
a) 15m/s
b) 14m/s
c) 13m/s
d) 12m/s
e) 11m/s
Mathematics
1 answer:
Mars2501 [29]3 years ago
8 0

Answer:

a) 15 m/s.

Step-by-step explanation:

s(t) = 2t^2+ 3t

Distance at 2 seconds =  s(2) = 2(2)^2 + 3(2) =  14 m.

Distance at 4 seconds =  s(4) = 2(4)^2 + 3(4) =  44 m.

Average velocity = distance travelled from t = 2 until t = 4 /  time

= (44 - 14) / 4 -2

= 30/2

= 15 m / s.

You might be interested in
Which methods correctly solve for the variable s in the equation -2 - 5s =9?​
Ivanshal [37]
The answer is C: first add 2 both sides then divide both sides by -5.
3 0
2 years ago
What is the length of AB
sweet [91]

Answer:

6 units is the answer im pretty sure

6 0
3 years ago
There were a total of three football games a month. The season is played for four months. How many football games are in the sea
svp [43]

Answer:

12

Step-by-step explanation:

Because 3 games per month and there are 4 months in a season SO 3*4=12 games

5 0
2 years ago
Read 2 more answers
Use special right triangles to find the exact value (no decimals).
fgiga [73]

Let’s find some exact values using some well-known triangles. Then we’ll use these exact values to answer the above challenges.

sin 45<span>°: </span>You may recall that an isosceles right triangle with sides of 1 and with hypotenuse of square root of 2 will give you the sine of 45 degrees as half the square root of 2.

sin 30° and sin 60<span>°: </span>An equilateral triangle has all angles measuring  60 degrees and all three sides are equal.  For convenience, we choose each side to be length 2.  When you bisect an angle, you get 30 degrees and the side opposite is 1/2 of 2, which gives you 1.  Using that right triangle, you get exact answers for sine of 30°, and sin 60° which are 1/2 and the square root of 3 over 2 respectively.

Now using the formula for the sine of the sum of 2 angles,

sin(A + B) = sin A cos<span> B</span> + cos A sin B,

we can find the sine of (45° + 30°) to give sine of 75 degrees.

We now find the sine of 36°, by first finding the cos of 36°.

<span>The cosine of 36 degrees can be calculated by using a pentagon.</span>

<span>that is as much as i know about that.</span>

5 0
3 years ago
HELP ME I DOMT UNDERSTAN
guajiro [1.7K]
The first one is -30 seconds
the second one is 20 meters
the third one is 0
3 0
3 years ago
Read 2 more answers
Other questions:
  • Please help Math Analysis !!!!!
    15·1 answer
  • Please answer this for me and thank you
    9·1 answer
  • Josh estimates the height of his desk. What is a reasonable estimate?
    15·1 answer
  • Subtract 6 from 4 times d
    11·1 answer
  • the sum of a two digit number is 4. if the order of the digits are reversed, the result is a number that exceeds the original nu
    14·1 answer
  • Ethan ran 11 miles in 2 hours.what is the unit rate of miles to hour?
    15·1 answer
  • Select the correct answer. Which expression is equivalent to this polynomial? 9x^2 - 4
    9·1 answer
  • PLEASE HELP SOON! A 2011 study by the National Safety Council estimated that there are nearly 5.7 million traffic accidents year
    12·1 answer
  • Based on the table, how much more money would a person with a bachelor's degree earn than a person with an associate's degree ov
    15·2 answers
  • Which associations best describe the scatter plot?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!