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Pie
3 years ago
14

Dan uses a remote control to make his drone take off from the ground. Function h represents the height, in feet, of the drone t

seconds after it begins flying.
h(t)= -16(t-2)^2+64

Which statement correctly describes this situation?

A.
The drone is on the ground at 0 and 2 seconds.
B.
The drone is on the ground at 0 and 16 seconds.
C.
The drone is on the ground at 0 and 4 seconds.
D.
The drone is on the ground at 2 and 4 seconds.
Mathematics
2 answers:
Licemer1 [7]3 years ago
8 0

Answer:

The drone is on the ground at 0 and 4 seconds.

Step-by-step explanation:

PLATO test

alex41 [277]3 years ago
6 0

Answer: C.   The drone is on the ground at 0 and 4 seconds.

Step-by-step explanation:

Here the function that shows the height of the drone,

h(t) = -16(t-2)^2+64

Where t is the time in seconds.

Since, the drone is ground when, h(t) = 0

-16(t-2)^2+64=0

-16(t-2)^2 = -64   (by subtracting 64 from both sides 64)

(t-2)^2 = 4           (dividing both sides by -16 )

t^2-4t+4= 4        

t^2-4t= 0             (by subtracting 4 from both sides)

t(t-4)= 0      

⇒ t = 0 or t = 4  

Thus, Option C is correct.

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The measurement of the side of a RV is 469 inches the actual length is 480 inches what is the percent error
Ksivusya [100]

Answer:

Step-by-step explanation:

error in measurement  = 480 - 469 = 11 inches

Percent error = error *100/actual length

= 11 * 100 /480 = 2.9%

6 0
3 years ago
NEED ANSWERS NOW!! (Reward) brainlest and pointsss
geniusboy [140]

Answer:

D

Step-by-step explanation:

The equation of a parabola in vertex form is

y = a(x - h)² + k

where (h, k) are the coordinates of the vertex and a is a multiplier

To obtain this form use the method of completing the square.

Given

f(x) = - 0.6x² + 4.2x + 240 ← factor out - 0.6 from the first 2 terms

     = - 0.6(x² - 7x) + 240

To complete the square

add/ subtract ( half the coefficient of the x- term)² to x² - 7x

f(x) = - 0.6(x² + 2(- 3.5)x + 12.25 - 12.25 ) + 240

      = - 0.6 (x - 3.5)² + 7.35 + 240

     = - 0.6(x - 3.5)² + 247.35

with vertex = (3.5, 247.35 )

The maximum value is the y- coordinate of the vertex

Then

f(x) = - 0.6(x - 3.5)² + 247.35 has a maximum value of 247.35

5 0
3 years ago
Solve the system of equations<br> -5x+13y+-7<br> 5x+4y=24<br> y=<br> x=
aleksklad [387]
<h3>The value of y is equal to 1.</h3><h3>The value of x is equal to 4.</h3>

Because both equations have a term that will cancel out if they're added together, we're going to add both equations together.

-5x + 5x = 0

13y + 4y = 17y

-7 + 24 = 17

17y = 17

Divide both sides by 17.

y = 1

Now that we have a constant value of y, we can solve for x.

-5x + 13(1) = -7

-5x + 13 = -7

Subtract 13 from both sides.

-5x = -20

Divide both sides by -5.

x = 4


3 0
3 years ago
Read 2 more answers
I really need help this is a matter or passing or failing and I am counting on you for help!
coldgirl [10]

Answer:

B

Step-by-step explanation:

In order for something to have infinite solutions, both sides need to be equal to each other.

Example:

3x + 7y = 7y + 3x

That has infinite solutions

3x + 7y = 7x + 3y

That is not equal to each other because the variables are different.

Hope I helped :)

6 0
3 years ago
** PLEASE ANSWER I’L GOVE YOU BRAINLYLIST**
Leviafan [203]

Penelope eats 4 chocolates per day, because in one day, 20 chocolates are in the box. Then, after 2 more days, 8 chocolates are eaten. That means, if she eats an even amount of chocolates, she eats 4 chocolates per day. To check this pattern, on the fourth day, there are 8 chocolates left. 12 - 8 = 4, and the pattern would continue. On the fifth day, 4 chocolates would be left, and on the sixth day, 0 chocolates would be left.

3 0
3 years ago
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