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
Kipish [7]
3 years ago
10

A model rocket fired from the ground at time t can be modeled by the equation h= -490t² + 1120t. When is the height of the model

rocket 640 centimeters?

Mathematics
1 answer:
galben [10]3 years ago
6 0

9514 1404 393

Answer:

  t = 1 1/7 ≈ 1.1429 seconds

Step-by-step explanation:

Filling in the given height, we can solve for t:

  640 = -490t^2 +1120t

  49t^2 -112t +64 = 0 . . . . . divide by 10, put in standard form

  (7t -8)^2 = 0

  t = 8/7 . . . . . . . the value of t that makes the factor(s) zero

The model rocket will reach its maximum height of 640 cm after 1 1/7 seconds.

You might be interested in
I will appreciate if you answer this problem,thanks
aliya0001 [1]

Answer:

None

Step-by-step explanation:

By graphing out the both line segments through graphing software, segments AB and CD have no intersections on the co-ordinate plane.

I've attached a screenshot of what i graphed out.

3 0
3 years ago
Help me please come on please.
Alexeev081 [22]
I agree with 11.5 pounds
7 0
3 years ago
Suppose you pay $1.00 to roll a fair die with the understanding you will get $3.00 back rolling a 4 or a 2, and nothing otherwis
nikdorinn [45]

There are 2 chances out of 6 to win $3

Every 6 rolls you are expected to win $6

Every 3 rolls you are expected to win $3.

On average, even though it's impossible, every roll you would make $1.

6 0
3 years ago
HELP ME PLZZZZ I'LL GIVE ANYONE 100 FOR THE CORRECT ANSWER
Travka [436]

Answer:

The symbol '<' fits best.

Step-by-step explanation:

18 ÷ 6 + 3 □ 6 + 12 ÷ 3

=> 3 + 3 □ 6 + 4

=> 6 □ 10

Therefore, the symbol '<' fits best.

Hoped this helped.

3 0
3 years ago
Read 2 more answers
What is the precision of 40 feet
mina [271]
I think it may be the ability to get the correct/same answer (percision) to within 40 feet.
7 0
3 years ago
Other questions:
  • In August, the Simons water bill was $48. In September, it was15% lower. What was the Simons water bill in Septemper? I don't ge
    13·1 answer
  • Nevermind. i got the answerrrrrrrr
    11·1 answer
  • in Sean's fish tank there are six times as many goldfish as Guppies. There are a total of 21 fish in the tank. How many more gol
    7·1 answer
  • Two years ago, Rita was three times older than Cheryl. In 3 years, Rita will be twice older than Cheryl. How old are the girls n
    9·2 answers
  • Evaluate the function. F(x)=3/x-1/. F(-3)
    8·1 answer
  • In right ΔDEF, DF = 20, m∠ F = 90˚, EF = 17. Which of the following is true? Does option 5 apply
    6·1 answer
  • Can you please help me with this last question? I'm stuck​
    9·1 answer
  • 3. BIKING In order to train for a cross-state biking trip,
    9·1 answer
  • What is the rule for 2;13;26;32?​
    12·1 answer
  • Determine the domain and range Express your answer in interval notation
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!