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
SVEN [57.7K]
3 years ago
11

Casie jumped off of a cliff into the ocean while on vacation. Her height as a function of time is modeled by the equation h = −1

6t2 +16t + 140, where t is the time in seconds and h is the height in feet. How long does it take Casie to hit the water?
A) 3 seconds
B) 3.5 seconds
C) 4 seconds
D) 4.5 seconds
Mathematics
2 answers:
lyudmila [28]3 years ago
7 0

Answer:

3.5 seconds, B

Step-by-step explanation:

This is an upside down parabola, a function that is extremetly useful in helping us to understand position and velocity and time and how they are all related.  Her upwards velocity is 16 ft/sec and she starts from a height of 140 feet, according to the problem.  The h is the height she ends up at after a certain amount of time has gone by.  You want to know how long it will take her to hit the water.  When she hits the water, she has no more height.  Therefore, her height above the water when she hits the water is 0.  Plug in a 0 for h and factor the quadratic to get t = -2.5 seconds and t = 3.5 seconds.  The only two things in math that will never ever be negative is a distance measure and time, so we can disregard the -2.5 and go with 3.5 seconds as our answer.

lara31 [8.8K]3 years ago
4 0

Answer:

B

Step-by-step explanation:

You might be interested in
-3(-x - 7)<br><br> (Distributive property)
baherus [9]
I believe it is 3x+21 but i could be wrong :/ my explaination is -3 • -X would be +3x because it was distributed and -3 • -7 would be +21
5 0
3 years ago
(urgent please help!!!!)in computing the mean of 8 numbers, a student mistakenly used 17 instead of 25 as one of the numbers and
mamaluj [8]
I believe the correct mean is 21!
6 0
3 years ago
Read 2 more answers
Pls help I beg of you.
Mandarinka [93]
The semicircle is 25pi or 78.54

The rectangle is 120 (12*10)

The triangle is 24 (.5*12*4)

So the total is 222.54 (78.54+120+24)
7 0
3 years ago
Percents that are added together are _______ percents.
vivado [14]
Percents that are added together are combining percents.
4 0
3 years ago
On a treasure map, a X is placed at point (9, -7). if the pirates are currently on point (9,3), how many units away are they?​
Alex_Xolod [135]

Answer:

They are 10 units away from the treasure

Step-by-step explanation:

Notice that the points (9, -7) and (9, 3) are both located at the same x-value (9) while their y-values are in one case 3 units above the x-axis, and in the other 7 units BELOW the x-axis. Therefore thy differ by 3 - (-7) units , which totals 10 units.

8 0
2 years ago
Read 2 more answers
Other questions:
  • Can anyone help me with this? is equations of lines.
    7·2 answers
  • pppppppppppppppppppppppppllllllllllllllllllllllllllllllllllllllllleeeeeeeeeeeeeeeeeeeeeeeaaaaaaaaaaaaaaaaaaaasssssssssssssssssss
    6·2 answers
  • Cedric is constructing a kite in the shape of a rhombus.The spars of the kite measure 15 inches and 24 inches.How many fabric wi
    9·1 answer
  • Which statement about work-study is true?
    14·2 answers
  • Find the value of x in the triangle shown below
    8·1 answer
  • Solving using inverse operation 83 + q = 125 q =
    9·2 answers
  • Find the sum of the geometric series if n = 6, r= 1/4, a = 2.
    15·1 answer
  • Solve for x.<br> 5(x-2)-x-5= -3
    12·1 answer
  • Inga, Kai, and Jason volunteer in the school library. They want to find the average number of pages of a library book. It would
    15·2 answers
  • A and b are two similar solids. the volume of a is 400cm^3<br> work out the volume of b
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!