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
kumpel [21]
3 years ago
6

The altitude of an object, d, can be modeled using the equation below. d=-16t^2+vt+h From the edge of a 486-foot cliff, Peyton s

hot an arrow over the ocean with an initial upward velocity of 90 feet per second. In how many seconds will the arrow reach the water below?
Mathematics
1 answer:
Ugo [173]3 years ago
3 0

Answer:

9 seconds

Step-by-step explanation:

d=-16t²+vt+h

The water level will be at 0 level (distance = 0)

0 = 16t² - 90t - 486

8t² - 45t - 243 = 0

(t - 9) (8t + 27) = 0

t = 9 or t = -27

since time should be a positive number, so t = 9 second

You might be interested in
A particular employee arrives at work sometime between 8:00 a.m. and 8:30 a.m. Based on past experience the company has determin
Gala2k [10]

Answer:

0.3333 = 33.33% probability that the employee will arrive between 8:15 a.m. and 8:25 a.m.

Step-by-step explanation:

A distribution is called uniform if each outcome has the same probability of happening.

The uniform distributon has two bounds, a and b, and the probability of finding a value between c and d is given by:

P(c \leq X \leq d) = \frac{d - c}{b - a}

A particular employee arrives at work sometime between 8:00 a.m. and 8:30 a.m.

We can consider 8 am = 0, and 8:30 am  = 30, so a = 0, b = 30

Find the probability that the employee will arrive between 8:15 a.m. and 8:25 a.m.

Between 15 and 25, so:

P(15 \leq X \leq 25) = \frac{25 - 15}{30 - 0} = 0.3333

0.3333 = 33.33% probability that the employee will arrive between 8:15 a.m. and 8:25 a.m.

8 0
3 years ago
The coordinates of a quadrilateral are (1, 2), (4,2), (1.4), and (4,4). After a transformation, the new coordinates are (1, -2),
Lostsunrise [7]

Answer:

reflection across the x-axis

Step-by-step explanation:

4 0
3 years ago
Free pts! What is your favorite food?​
garri49 [273]

My favorite food is Pizza

4 0
3 years ago
Solve: 5(x + 2) = 3x + 5
azamat

Answer:

Exact Form: x = -5/2

Decimal Form: x = -2.5

Mixed Form: x = 2 1/2

5 0
2 years ago
Read 2 more answers
At a certain college, there were 700 science majors, 300 engineering majors, and 500 business majors. If one student was selecte
Sliva [168]
The probability that the major of one student that is selected at random is engineering can be calculated by the total number of engineering major divided by the total number of students

p = engineering / total students
p = 300 / ( 300 + 700 + 500)
p = 0.2 is the probability of the major of one student is engineering
7 0
4 years ago
Other questions:
  • For what values of x is the following inequality true? 5/7 + x/7 >(underlined) 10. PLZ HELP!!! 12 points
    8·1 answer
  • Shannon wants to frame a square painting. She wants the perimeter of the thin square frame to be between 12 inches an
    5·2 answers
  • The product of two numbers is 48, and one of the numbers is 12. Find the other number.
    10·2 answers
  • Find the value of x so that f(x) = 7.
    14·1 answer
  • Let $f(x) = x^2$ and $g(x) = \sqrt{x}$. Find the area bounded by $f(x)$ and $g(x).$
    14·1 answer
  • One angle of an isosceles triangle measures 40°. Which other angles could be in that isosceles triangle? Choose all that apply.
    11·1 answer
  • - 32x - 40<br> What is the first step that I should do
    10·1 answer
  • Combine Like terms: 3x – 2x + 5 + x<br><br> pls show work
    11·1 answer
  • Lilly bought 4 pairs of jeans at a cost of $39 each. How much money did she give the clerk?
    8·1 answer
  • What percent of the bottle of apple juice is water
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!