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
yarga [219]
2 years ago
11

Naima is on a bridge 12 feet above a pond. She throws a handful of fish food straight down with a velocity of 8 feet per second.

In how many seconds will it reach the surface of the water? What is the domain and range of this function? (Note: Since the velocity is downward, it will be negative)
Mathematics
1 answer:
Svetllana [295]2 years ago
4 0

Answer:

1.5 seconds i think kkkkkk

You might be interested in
If Upper X overbar equals 62​, Upper S equals 8​, and n equals 36​, and assuming that the population is normally​ distributed, c
marishachu [46]

Answer:

The 99% confidence interval would be given by (58.373;65.627)    

We are 99% confident that the true mean for the variable of interest is between 58.373 and 65.627.

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

\bar X=62 represent the sample mean

\mu population mean (variable of interest)

s=8 represent the sample standard deviation

n=36 represent the sample size  

Part a: Confidence interval

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:

df=n-1=36-1=35

Since the Confidence is 0.99 or 99%, the value of \alpha=0.01 and \alpha/2 =0.005, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.005,35)".And we see that t_{\alpha/2}=2.72

Now we have everything in order to replace into formula (1):

62-2.72\frac{8}{\sqrt{36}}=58.373    

62+2.72\frac{8}{\sqrt{36}}=65.627    

So on this case the 99% confidence interval would be given by (58.373;65.627)    

We are 99% confident that the true mean for the variable of interest is between 58.373 and 65.627.

3 0
3 years ago
What is the difference between Z1 and z2, and where is the difference located?
NeTakaya

Answer:

B

Step-by-step explanation:

Took the test

7 0
3 years ago
Read 2 more answers
If rx – st = r, which expression represents r.
statuscvo [17]

Answer:

{ \tt{rx - st = r}}

» Collect like terms, r terms on the left hand side by subtracting r from both sides and adding st to both sides

{ \tt{(rx - st) { \green{ - r + st }} = r{ \green{ - r + st}}}} \\ { \tt{rx - r = st}}

» On the left hand side, factorise out r

{ \tt{ \green{r(x - 1)} = st}} \\  \\ { \boxed{ \tt{ \blue{ \: r =  \frac{st}{x - 1} }}}}

5 0
2 years ago
What are the benefits to using technology over a handheld compass and straightedge?
Nady [450]
A benefit is the technology can be more aaurate and you can use a compass and a straightedge wrong and get lost. Also the compass can break
7 0
3 years ago
A movie rental website charges $5.00 per month for membership and $1.25 per movie.Melissa has $18.50 this month to spend on movi
irina [24]
She can only but 14 movies because 18.50÷1.25= 14.8 and then 1.25×14=17.5
7 0
3 years ago
Read 2 more answers
Other questions:
  • The expression 17n+11 represents the perimeter of a triangle. The other two sides measure 4n+5 and 5n+6. A simplified expression
    7·2 answers
  • Y=x​2​​−6x+10​<br> y=4−x​​<br><br><br> How do I substitute?
    12·1 answer
  • Next question! Help please!!
    14·1 answer
  • What is the measurement of N?<br> A) 17° <br> B) 18° <br> C) 20° <br> D) 45°
    14·2 answers
  • I don't get how to even do this its solving equations with variables on each side. 8y-3=6y+17
    8·1 answer
  • What are factors?
    10·1 answer
  • Question 6
    6·1 answer
  • HELP!!!!! PLEASE AND THANK YOU
    5·2 answers
  • The width of a rectangle room is 80 percent of its length. WHat is the area of the room?
    7·1 answer
  • Which of these is a good conductor?<br> wood<br> silver<br> paper<br> air
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!