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
topjm [15]
3 years ago
14

Arthur drops a ball from a height of 81 feet above the ground. Its height, h, is given by the equation h = –16t2 + 81, where t i

s the time in seconds. For which interval of time is the height of the ball less than 17 feet?
Mathematics
2 answers:
Lorico [155]3 years ago
6 0

Answer:

Step-by-step explanation:

We are given the position function and need to find the value of t when h<17.

Create an inequality that represents this situation:

-16t^2+81 The "less than" sign makes this very specifically a conjunction problem as opposed to a disjunction. That's important to the solution. But we'll get there.

The simplest way to solve this is to subtract 81 from both sides:

-16t^2 then divide both sides by -16:

t^2>4 Notice now that the sign is facing the other way since we had to divide by a negative number. Now it's a disjunction. The solution set to this inequality is that t>2 or t<-2. First and foremost, time will never be negative, so we can disregard the -2. Even if that was t<2, the more time that goes by, the greater the time interval is, not the lesser. It's the "<" that doesn't make sense, not only the -2. The solution to this inequality is

t > 2 sec. That means that after 2 seconds, the height of the ball is less than 17 feet.

MariettaO [177]3 years ago
3 0

Answer:

A on edg

Step-by-step explanation:

You might be interested in
What are the possible rational zeros of f(x) = x^4 + 6x^3 − 3x^2 + 17x − 15?
loris [4]
Hmm, I got these for roots:
0.7937053103356799
0.026855090968934903   +i* 1.6611004538114105
0.026855090968934903   -i* 1.6611004538114105
-6.84741549227355

8 0
2 years ago
Find the value of y so that r⎹⎹ s A. 32 B. 56 C. 64 D. 124 please help
4vir4ik [10]
We need more detail I will help when i get a real question

7 0
3 years ago
Which fractions have a least common denominator of 36?
lutik1710 [3]

Answer:

The answer is a =3/4 and 5/18

Step-by-step explanation:

5 0
2 years ago
What is the y-intercept of the graph of the equation y=4x(3x) A; (0,4) B: (0,3) C;(0,12) D:(0,8)
Alchen [17]

Answer:

To find y intercept x should be 0.

And in this.

Y=4x.3x

Y=4*0*3*0

Y=0 answer.

4 0
2 years ago
35 POINTS AVAILABLE
serious [3.7K]

Answer: Circle A, EF is a minor Arc, EAD = 45 degrees, Arc EF= 150 Degrees, and FCE = 210 I guess from the looks of the Picture.

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Other questions:
  • Can someone help me with 2 please
    5·1 answer
  • pet supplies make a profit of 5.50 dollars per bag on its line of natural dog food at the store wants to make a profit no less t
    14·1 answer
  • Solve the following problem Jana buys a dress for 25.98 and a blouse for 14.99.
    8·2 answers
  • 243/8-(541/8)= how to solve it
    12·1 answer
  • HELP ASAP IT'S AN EMERGENCY​
    5·1 answer
  • Help me ASAP!!!!!!!!!!!
    8·2 answers
  • 65 POINTS PLS help
    10·2 answers
  • Can u help me on this... I will mark u as brilliant students.. plz ​
    10·1 answer
  • Which of these tables represents a linear function?<br><br>​
    15·1 answer
  • Can you go to my profile and help with some questions please?<br> Please
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!