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
garri49 [273]
3 years ago
15

1) A projectile is thrown upward so that its distance above the ground after t seconds is

Mathematics
1 answer:
leonid [27]3 years ago
4 0

Answer:

After 22 seconds the projectile reach its maximum height of 4,840 units

Step-by-step explanation:

we have

h(t)=-10t^{2}+440t

This is a vertical parabola downward (because the leading coefficient is negative)

The vertex is a maximum

Find out the coordinates of the vertex

Convert the quadratic equation in vertex form

Factor -10

h(t)=-10(t^{2}-44t)

Complete the square

h(t)=-10(t^{2}-44t+22^2)+(10)(22^2)

h(t)=-10(t^{2}-44t+22^2)+4,840

Rewrite as perfect squares

h(t)=-10(t-22)^{2}+4,840

The vertex is the point (22,4,840)

therefore

After 22 seconds the projectile reach its maximum height of 4,840 units

You might be interested in
Three distributions, labeled (a), (b), and (c), are represented below by their histograms. Each distribution is symmetrical and
Neporo4naja [7]

Answer:

order is

αb<αc<αa

Step-by-step explanation:

in a )

number 4 and number  12 are showing 3 bullets while number 7 and 9 showing 2 bullets hence

standard deviation for a=3-2=1

in b)

number 4 ,7,9 and number  12 are showing 2 bullets while number 3 and 13 showing 1 bullet hence

standard deviation for a=2-1=1

in c)

number 4 ,7,9 and number  12 are showing 2 bullets while number 5 and 11 showing 1 bullet hence

standard deviation for a=2-1=1

order isαb<αc<αa


6 0
3 years ago
What is significant digit rules and how is it used?
torisob [31]

Answer:

Non-zero digits are always significant. Any zeros between two significant digits are significant. A final zero or trailing zeros in the decimal portion ONLY are significant.

Step-by-step explanation:

  • Non-zero digits are always significant.
  • Any zeros between two significant digits are significant.
  • A final zero or trailing zeros in the decimal portion ONLY are significant.

Heres a something that might help:

Download pdf
6 0
3 years ago
Help!! limited time!!
Zina [86]
Hope this helps
1.) 2(8×-1)+ 2(2×+4)
2. 16x-2+ 4x+8
3. 20x+6

7 0
3 years ago
Find the measure of each minor arc formed by a regular octagon inscribed in a circle. A. 15° B. 30° C.45° D. 60°
marin [14]
Your octagon has a central angle of 360 deg.  Since you're speaking of an octagon, which implies that the octagon is made up of eight triangles, divide 360 deg by 8 to obtain the measure of each minor arc formed.
6 0
3 years ago
The central angle of a minor arc is an acute angle.
Nostrana [21]
<span>The central angle in a minor arc is acute. In a minor arc, the angle must be less than 180˚. However, it doesn't have to be less than 90˚. So the central angle is sometimes acute. 

hope this helps u leave a like if it does</span>
3 0
3 years ago
Other questions:
  • Solve 3x+1=3 thanks
    7·2 answers
  • Nick thought of a counting number, and then he added the next counting number to it. He got the sum of 79. What was Nick's numbe
    6·1 answer
  • Question 9 of 10 Mrs. Hall records the heights of 50 students in a spreadsheet. The mean height is 68 inches. After looking at t
    8·1 answer
  • 3(6+4y)<br> hurry uppp pleaseeeee
    8·1 answer
  • 2x -3y=4:(2,) fill the other coordinates
    8·2 answers
  • Find the length of the third side. If necessary, round to the nearest tenth.<br> 1<br> 20<br> 10
    6·2 answers
  • I really need the help please and thank you
    9·1 answer
  • PLEASE SOMEONE HELP ME WITH THIS PROBLEM
    11·1 answer
  • Help please I'll mark brainliest if I can​
    12·2 answers
  • How can you get a equivalent ratio? I need help!<br>​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!