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
PolarNik [594]
3 years ago
6

A model airplane is shot up from a platform 1 foot above the ground with an initial upward velocity of 56 feet per second. The h

ight of the airplane above ground after t seconds is given by the equation h=-16t^2+56t+1 where h is the hight of the airplane in feet and t is the time in seconds after it is launched. Approximately how long does it take the airplane to reach its maximum height?
A)0.3 seconds
B)1.8 seconds
C)3.5 seconds
D)6.9 seconds
Please Help
Mathematics
2 answers:
docker41 [41]3 years ago
8 0

Answer:

The correct answer is B. 1.8 seconds. I just took the test!


Law Incorporation [45]3 years ago
4 0
H=-16t^2+56t+1, the airplane is shot up from a platform 1 foot above the ground, so 1= - 16t^2+56t+1, we solve this equation
(- 16t+56)t=0, (- 16t+56)=0 or t=o, - 16t+56=0, implies t =3.5s
so the answer is C)3.5 seconds 
You might be interested in
Diane has a rope that is 8 meters long. She cuts away a piece that is 1.67 meters long. How long is the remaining piece of rope?
Readme [11.4K]

Answer:

6.33 m

Step-by-step explanation:

Total length of the rope = 8 m

Cut length of the rope = 1.67 m

We need to find the remaining piece of the rope.

Remaining piece = Total length - cur length

= 8 m - 1.67 m

= 6.33 m

So, 6.33 m is the remaining piece of the rope.

3 0
2 years ago
23, 24 And 25 please. Thank you!
Vesna [10]

Step-by-step explanation:

23. area of rect,r = 11 x 3.5 = 38.5cmsq

area of tri, t = 6 x3.5/2 = 10.5 cmsq

area of shaded region, sr = r-t

=> sr = 38.5- 10.5 = 28.5cmsq

24. area of square, s = 10x10 = 100mmsq

area of circle, c = pi x 5^2 = 78.5mmsq

area of shaded region, sr = s - c

=> sr = 100- 78.5 = 22.5mmsq

25. area of circle, c = pi x 6^2 = 113.04insq

area of tri, t = 6x12/2 = 36insq

area of shaded region, sr = c - t

=> sr = 113.04 - 36 = 77.04insq

3 0
3 years ago
1.
trasher [3.6K]

Answer:

1

Step-by-step explanation:

3(1)+5=8

3(0)+5=5

3(2)+5=11

3(3)+5=14

3(4)+5=17

.....

Need=51

S=12.75

G=6.5/hr•2hr=13

W=5.25/hr•5hr=26.25

S+g+w=12.75+13+26.25=52

Yes because total will be 52

......

5x+3≥23

5x≥20

x≥4

[4,8,12]

.......

9w

.....

38.88+1.87x

.....

9x-3

....

x=56

...

69=18+19+t

69=37+t

32=t

...

77-20.1-10.39=s

...

2

....

11 doesn't have an equation to solve.

...

12 doesn't have a solution to solve.

....

n≤7

...

32≤14+m

18≤m

....

120≤20+m

100≤m

...

d=50t

...

Y=5.5x

....

Y=4x

...

Dependent variable is distance.

3 0
3 years ago
Read 2 more answers
A and B are two events. Let P(A)=0.5 , P(B)=0.9 and P(A and B)=0.15 .
Nana76 [90]

Answer:

option-C

Step-by-step explanation:

we are given

Let P(A)=0.5

P(B)=0.9

P(A and B)=0.15

we know that

P(A|B)=\frac{P(Aand B)}{P(B)}

now, we can plug values

P(A|B)=\frac{0.15}{0.9}

P(A|B)=0.16666

but we have

P(A)=0.5

we can see that both are not equal

P(A|B)\neq P(A)

so, A and B are not independent

so, option-C........Answer


5 0
3 years ago
Bobby E. Lee has completed 57% of the race. If he has completed 114 laps, how many total laps are in the race?
Alexus [3.1K]

Answer:

100% is 200 laps

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • Jerry walked 1.5 mailed directly west. Than he walked 1.5 miles east. At this point how many miles did Jerry walk
    14·1 answer
  • A certain triangle has a perimeter of 3059mi. The shortest side measures 79 mi less than the middle side and the longest side me
    12·1 answer
  • A square patio has an area of 221 square feet. How long is each side of the patio to the nearest 0.05?
    8·1 answer
  • which three numbers make a right triangle the square root of 4 the square root of 5 the square root of 9 + square root of 6 the
    9·1 answer
  • Write an equation for a parabola with a focus of (1,-2) and a directrix of y=6
    12·1 answer
  • 2b - 19 = 11<br> Show explanation
    14·2 answers
  • To make enough chili for the chili cook-off, Lee needs 20 pounds of ground
    11·2 answers
  • Help please again. thank chu
    7·2 answers
  • I need help doing this
    8·1 answer
  • A circus tent is cylindrical up to a height of 7 m and is in the shape of a cone over it, the diameter of the cylindrical part i
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!