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
Leviafan [203]
2 years ago
11

An object is launched from a platform.

Mathematics
1 answer:
tankabanditka [31]2 years ago
8 0

Answer:

  10

Step-by-step explanation:

Ground level is where h = 0, so solve the equation ...

  h(x) = 0

  -5(x -4)^2 +180 = 0 . . . . substitute for h(x)

  (x -4)^2 = 36 . . . . . . . . . . divide by -5, add 36

  x -4 = 6 . . . . . . . . . . . . . . positive square root*

  x = 10 . . . . . . add 4

The object will hit the ground 10 seconds after launch.

_____

* The negative square root also gives an answer that satisfies the equation, but is not in the practical domain. That answer would be x = -2. The equation is only useful for time at and after the launch time: x ≥ 0.

You might be interested in
Q6: 24 students in a class took an algebra test.
german

Answer:

25%

Step-by-step explanation:

18/24 passed that reduces 3/4.

So 1/4 didn't pass

4 0
3 years ago
To convert a percent to a fraction, which of the following is not done?
slavikrds [6]
What you do, to convert a percention to a fraction is to divide the percent by 100. This will give you the fraction of that percent. Knowing this, you can eliminate all the other possible answers that have been listed.
4 0
3 years ago
If laura bought 2.1 pounds of apples is the price per pound of apples greater than or less than $1? How can you tell?
krok68 [10]

Answer

greater than $1.

Step-by-step explanation:

the price of apples per pound is $1.37, therefore, the price per pound of apples is greater than $1.

6 0
2 years ago
Read 2 more answers
In an experiment you do a chi-square test comparing observed and expected progeny. Your calculated chi square is 0.375. With 1 d
myrzilka [38]

Answer:

It mean that the observed progeny is similar than the expected progeny. There is no a relationship between the categorical variables.

Step-by-step explanation:

The Chi-squared test is used to test the relationship between categorical variables. A categorical variable is a non-numerical variable. The null hypothesis of the Chi-squared test is that categorical variables are independent; it means that the frequencies are not dependent on the variable. It is important to know that the Chi-squared test does not measure causality, it only measures the relationship. To reject the null hypothesis, you usually need a probability lower than 0.05, but in this case, the probability was way higher than 0.05, it was between 0.5 and 0.9.

4 0
3 years ago
Q) The distance between points A(2,1) and B(2,4) is ___ units.
madreJ [45]

Answer:

3 or (0,3)

Step-by-step explanation:

8 0
2 years ago
Other questions:
  • What is the formula to find the area of a rectangle?
    12·2 answers
  • Forty-two divided by seven plus the quantity three divided by six 1. Write the numerical expression. 2. Evaluate within parenthe
    8·2 answers
  • The number line shows two points with coordinates negative 15 and positive 2.
    13·1 answer
  • Solve Two Step Eqautions
    8·1 answer
  • What is the perimeter of a rectangle with length of √18 and width of √8 in simplest form?
    9·1 answer
  • Helppppl +13 points & +star
    14·1 answer
  • If you bought 12 cookies (each cookie for 0.99) how much more would each cookie cost than if you bought them by the dozen? ( A d
    9·1 answer
  • Lol lol lol lol v lollollollollollollollollollollol
    6·2 answers
  • Solve the equation for x:
    6·1 answer
  • Question Help
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!