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
olasank [31]
2 years ago
8

A model rocket is fired from the ground at time t=0, and it’s height is given in cm by the formula h=-490t^2 +1470t where t is m

easured in seconds.
Write an equation to find when the height of the rocket is 980 cm.


Solve the equation by factoring.


Explain why there are two solutions to this problem.
Mathematics
1 answer:
Natali [406]2 years ago
4 0

Step-by-step explanation:

h = -490t² + 1470t

When h = 980:

980 = -490t² + 1470t

Simplifying:

0 = -490t² + 1470t - 980

0 = t² - 3t + 2

Factoring:

0 = (t - 1) (t - 2)

t = 1, 2

There are two solutions because the rocket first reaches the height of 980 cm as it's going up at 1 second, then it reaches that height again as it's coming down at 2 seconds.

You might be interested in
Pls help ;-;
anyanavicka [17]

Answer:

C

Step-by-step explanation:

A closed circle means inclusive, and -2 is included in values that would make the equation true. Then you just have to test another number greater than and less than -2 to see which way the arrow should point.

-3(-3) + 1 < 7

9 + 1 < 7

10 < 7 FALSE

-3(0) + 1 < 7

1 < 7 TRUE

All values (including -2) will make this equation true

6 0
3 years ago
Read 2 more answers
Help please, from anyone.
Fed [463]

Answer:

your answer should be 15%

5 0
3 years ago
A brand new filled jar of salsa is 11 cm tall and a has a radius of 6 cm. Kelly eats some of the salsa and the salsa in the jar
Sonbull [250]

Before we begin please note that a jar is always cylindrical in shape if not mentioned otherwise. Thus, we will take a cylindrical jar in this case.

Since Kelly eats some of the salsa and the salsa in the jar is now 6 cm high, we know that Kelly ate the amount of Salsa whose volume is missing from the jar.

To find the missing volume on the Salsa jar all that we need to do is to find the height of the missing volume which is given to us as h= 6 cm. We already know that the radius of the jar, r=6 cm. Thus, the amount of Salsa Kelly has eaten is:

V=\pi(6)^2\times 6\approx678.6\approx679 cm^3

Thus, the third option is the correct answer

8 0
3 years ago
Read 2 more answers
Find the inverse of this function <br> g(x)=2(x-3)^5
swat32
Here you go, let me know if you have a question about the steps

4 0
3 years ago
What is the distributive property of 24+40
Scorpion4ik [409]
(20+40)+4

So basically the easiest way to remember is for example:
Normal: 69+45
Distributive property: (60+40)+9+5
———————————————————
So if you have 24 you need to distribute the numbers to make them into tens. That’s how you get 4.
———————————————————
I didn’t explain it very well but hope it helped a little bit.
8 0
3 years ago
Other questions:
  • What is the x intercept of the line 3x+2y-10=0
    14·2 answers
  • The volume of the sun is 1.4 x 10 to the power of 18 cubic kilometers and the volume of the earth is 1.1 x 10 to the power of 12
    14·1 answer
  • What is the slope of the line shown?
    8·1 answer
  • 9. A bag contains 40 slips of paper, numbered 1-40. If one slip is chosen at random, what is the
    7·1 answer
  • 10
    6·2 answers
  • Approximate: log5 ^4/7
    11·1 answer
  • Which of the following values satisfy the inequality shown? you must select all that apply -4≤20
    8·2 answers
  • A clothing store buys a box of hats for $124.00 and resells them for $12.00 per hat If h represents the number of hats in a box,
    10·1 answer
  • 6ε−2(7+3ε)&gt;5(2ε−3)−ε<br> solve the inequality
    5·1 answer
  • Two cars traveled equal distances in different amounts of time. Car A traveled the distance in 2.4 h, and Car B traveled the dis
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!