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
valentina_108 [34]
3 years ago
8

Pllllllllllllllzzzzzzzzzzzzzzz hhheeeellllllllpppppppppppp

Mathematics
1 answer:
Scrat [10]3 years ago
3 0

Answer:

I think it should be the third option

You might be interested in
An object is launched from a launching pad 144 ft. above the ground at a velocity of 128ft/sec. what is the maximum height reach
ollegr [7]

Answer:

18) a. h(x) = -16x² + vx + h(0) ⇒ h(x) = -16x² + 128x + 144

b. The maximum height = 400 feet

c. Attached graph

19) The rocket will reach the maximum height after 4 seconds

20) The rocket hits the ground after 9 seconds

Step-by-step explanation:

* Lets study the rule of motion for an object with constant acceleration

# The distance S = ut ± 1/2 at², where u is the initial velocity, t is the time

  and a is the acceleration of gravity

# The vertical distances h in x second is h(x) - h(0), where h(0)

   is the initial height of the object above the ground

∵ h(x) = vx + 1/2 ax², where h is the vrtical distance, v is the initial

  velocity, a is the acceleration of gravity (32 feet/second²) and x

  is the time

18)a.

∵ The value of a = -32 ft/sec² ⇒ negative because the direction

   of the motion

  is upward

∴ h(x) - h(0) = vx - (1/2)(32)(x²) ⇒ (1/2)(32) = 16

∴ h(x) = vx - 16x² + h(0)

∴ h(x) = -16x² + vx + h(0) ⇒ proved

* Find the height of the object after x seconds from the ground

∵ h(0) = 144 and v = 128 ft/sec

∴ h(x) = -16x² + 128x + 144

b.

* At the maximum height h'(x) = 0

∵ h'(x) = -32x + 128

∴ -32x + 128 = 0 ⇒ subtract 128 from both sides

∴ -32x = -128 ⇒ ÷ -32

∴ x = 4 seconds

- The time for the maximum height = 4 seconds

- Substitute this value of x in the equation of h(x)

∴ The maximum height = -16(4)² + 128(4) + 144 = 400 feet

c. Attached graph

19)

- The object will reach the maximum height after 4 seconds

20)

- When the rocket hits the ground h(x) = 0

∵ h(x) = -16x² + 128x + 144

∴ 0 = -16x² + 128x + 144 ⇒ divide the two sides by -16

∴ x² - 8x - 9 = 0 ⇒ use the factorization to find the value of x

∵ x² - 8x - 9 = 0

∴ (x - 9)( x + 1) = 0

∴ x - 9 = 0 OR x + 1 = 0

∴ x = 9 OR x = -1

- We will rejected -1 because there is no -ve value for the time

* The time for the object to hit the ground is 9 seconds

8 0
2 years ago
Kevin ran at a rate of 13km/h convert his speed to meter minute
goldfiish [28.3K]
1 hour = 60 minutes

13/60 = 0.2

answer: 0.2<span>m/min
</span>
3 0
3 years ago
For a left-tailed test, the critical value of z so that a hypothesis test would reject the null hypothesis at 1% significance le
mars1129 [50]

Answer:

C.-2.33

Step-by-step explanation:

We are given that

Significance level, \alpha =1%=0.01

We have to find  the critical value of z  for a left-tailed test.

To find the critical value , we will use the z-table at significance level 0.01 for left-tailed test.

By using the z-table at significance level 0.01 for left-tailed test

The critical value of z at  1% significance level for left-tailed test

=-2.33

We get p-value by using z-critical value

P-value=0.0099<0.01

So, hypothesis  test would be reject the null hypothesis at  at 1% significance level.

Hence, the critical value of z=-2.33

Option C is true.

8 0
2 years ago
Im going to say the n word
Gennadij [26K]

Answer:

Don't

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
If you were to spin a spinner at right what would be the probability of landing on green or purple
AURORKA [14]

depending on how many green and purple there are, lets say 4, and there are 10 other colors, it would be 4/10 so its 40%

5 0
2 years ago
Other questions:
  • Please help me!!
    5·1 answer
  • Jermaine paid 37.95 for 11 gallons of gasoline.what was the price in dollars per gallon?
    7·2 answers
  • Which relation is a function?
    13·2 answers
  • Can someone help me please):
    15·1 answer
  • What is the greatest common factor of 39 and 6
    8·2 answers
  • Witch expression is equivalent to 5(6xt 3y)
    9·1 answer
  • 25 points? last one..Lol​
    15·2 answers
  • The avid class is making spirit buttons. They make 490 spirit buttons in 3 1/2 hours. Find the number of spirit buttons the avid
    8·2 answers
  • Helppppp 78 squared to the 3rd
    5·1 answer
  • The highest temperature recorded in the town of
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!