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
densk [106]
1 year ago
8

A bottle rocket is launched straight up. Its height in feet (y) above theground x seconds after launch is modeled by the quadrat

ic function: y =- 16x2 + 116x + 7.How many seconds did it take the rocket to strike the ground?

Mathematics
1 answer:
bazaltina [42]1 year ago
4 0

The eqution of height y in terms of the time x is

y=-16x^2+116x+7.

We are asked when the rocket will strike the ground, so that is the same that sayin when will the rocket's height will be zero again, that is, y=0. so we have to solve

-16x^2+116x+7=0.

the solutions of this equations are

x=\frac{-116\pm\sqrt[]{116^2-4(-16)(7)}}{2(-16)}=\mleft\{\begin{aligned}-0.05 \\ 7.3\end{aligned}\mright.

So, the rocket will strike the ground after 7.3 seconds

You might be interested in
A person jogged 10 times along the perimeter of a rectangular field at the rate of 12 kilometers per hour for 30 minutes. If fie
balu736 [363]

Answer:

20,000m²

Step-by-step explanation:

If they jog 12 km/h for half an hour, they have covered.

12 X 0.5 = 6km in 10 circuits. Making 1 perimeter

6 / 10 =0.6 km (600 m).

To determine area we need to convert this perimeter to length and width. We know that it is a rectangle, with 2 equal widths and 2 equal lengths, and the length is twice the width.

So L = 2W

Perimeter = 2W + 2L

600 m = 2W + 2(2W)

600 m = 6W

W = 100 m

L = 200 m

Area = 100 X 200 = 20,000 m²

4 0
2 years ago
If UW = 9x – 9, what is UW in units?
Tju [1.3M]
I will answer this question to the best of my ability, because you have not provided a value of x to plug in.


UW is always equal to 9x-9 or 9(x-1) whenever x is a real number.  By plugging in x, we can get the value.  For example, if x was 4, we plug in x, giving us 9*4-9=36-9=27 units or 9(4-1)=9(3)=27 units
Don't forget to include units when you complete your answer!

Hope this helps!  I did as much as I could!
5 0
3 years ago
I need help on this please
Ipatiy [6.2K]
I can not see the image you provided .
4 0
3 years ago
Read 2 more answers
To convert 25 hours to minutes would you use the ratio 1/60
kodGreya [7K]

Answer:

Yes

Step-by-step explanation:

1 hour = 60 min

25 hours = 60 x 25 min

5 0
2 years ago
Awser 14 for me please
never [62]
A sorry I can't see the image
6 0
3 years ago
Other questions:
  • 2x-5=7<br> Find out what x is
    5·2 answers
  • What is the solution to this system of equations ?
    7·1 answer
  • If its 10/16 what is answer as a decimal
    14·2 answers
  • Karlene is keeping track of her calcium intake for a nutrition challenge at school. So far, she
    15·1 answer
  • The sale price of a new compact disc player is $202 at a local discount store. At the store where this sale is going on, each ne
    8·1 answer
  • Kay has decided to take out a $23,100 loan, and she wants to pay it back in quarterly installments. She has narrowed her options
    13·1 answer
  • -k/3 = 9<br> answer = ??
    5·2 answers
  • HELPA SAP PLEASE!<br><br> Please check which answer is correct!!!
    15·1 answer
  • The absolute value of ______ is the same number<br><br> Fill in the blank
    5·2 answers
  • Help with what u can thx peeps brainliest :)
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!