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
mojhsa [17]
2 years ago
10

A stone is thrown vertically upward from a platform that is 20 feet height at a rate of 160 ft/sec. Use the quadratic function h

(t) = −16t^2 + 160t + 20 to find how long it will take the stone to reach its maximum height, and then find the maximum height.
Mathematics
1 answer:
Nutka1998 [239]2 years ago
6 0

Check the picture below.

\textit{vertex of a vertical parabola, using coefficients} \\\\ y=\stackrel{\stackrel{a}{\downarrow }}{-16}x^2\stackrel{\stackrel{b}{\downarrow }}{+160}x\stackrel{\stackrel{c}{\downarrow }}{+20} \qquad \qquad \left(-\cfrac{ b}{2 a}~~~~ ,~~~~ c-\cfrac{ b^2}{4 a}\right)

\left(-\cfrac{ 160}{2(-16)}~~~~ ,~~~~ 20-\cfrac{ (160)^2}{4(-16)}\right) \implies \left( - \cfrac{ 160 }{ -32 }~~,~~20 - \cfrac{ 25600 }{ -64 } \right) \\\\\\ \left( 5 ~~~~ ,~~~~ 20 +400 \right)\implies (\stackrel{seconds}{5}~~,~~\stackrel{feet}{420})

You might be interested in
5. Al earns $96 for six hours of work. How much would he earn in eight hours?​
love history [14]

Answer:

96/6=16

16x8=128

Therefore Al makes 128 dollars for 8 hours

7 0
3 years ago
Read 2 more answers
How many solutions does the system of equations have?<br> x = -3y + 4 6y + 2x = 8
Setler79 [48]

Answer:

The equation x = -3y + 4 6y + 2x = 8 has <u>infinite </u>number of<u> </u>solutions.

7 0
3 years ago
What error did Maria likely make?
raketka [301]
She didn’t notice that the 3 and the 4 both do not have the variable “n” with them
She just added up all the numbers together then added the variable at the end.
7 0
4 years ago
If x and Y are positive integers ,is x - y always positive ? Explain
kykrilka [37]
No not always, because x could be a smaller number than y which would make it an negative. If x is bigger than y most likely it will be, but not always.
5 0
4 years ago
Donna read 18 out 30 pages in her book. What percent of the book did she read.​
Nana76 [90]

Answer:

Step-by-step explanation:

18/30 × 100%

= 0.6 × 100%

= 60%

7 0
4 years ago
Read 2 more answers
Other questions:
  • A factor of 10 is 5 and a multiple of 10 is 20. Is it possible for any number to be both a factor and a multiple of 10?
    9·1 answer
  • A class of 32 students earned grades of A,B,C,D on a test. One - fourth of the students earned an A. Half of the remaining stude
    12·2 answers
  • 24 divided by 9,528=
    15·2 answers
  • angles X and Y are supplementary and the mesure of angle X is 24 degrees greater than the measure of angle Y. Find the measures
    5·1 answer
  • Please help with at least one of these( I accept 1 answer if you have it; make sure you are 100% positive its correct though!)
    15·1 answer
  • The usual price of an oven was $1139. Mrs Bala bought the oven at a 15%
    6·2 answers
  • The measures of the angles of a triangle are shown in the figure below. Solve for x.<br> 80°<br> 39
    11·1 answer
  • Help PLZ Answer Questions Below
    9·1 answer
  • Pls help me I’m struggling
    11·2 answers
  • Which statement accurately describes the graph 2y = 4x + 8?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!