A ball is launched into the sky at 54.4 feet per second from a 268.8 meter tall building. The equation for the ball’s height, h, at time t seconds is h = -3.2t^2 + 54.4t + 268.8. When will the ball strike the ground?

Answers

Answer 1

Answer:

7.41

Step-by-step explanation:

Vertical component:

S = 268.8

U = 0

V =?

A = 9.8

T=?

S = ut + 0.5at^2. u = 0

268.8 = 0.5x9. 8xt^2

T = 7.41 seconds

Answer 2

Answer:

4.42 seconds is the correct answer

Step-by-step explanation:


Related Questions

A person was modeling a declining population with a decay factor of 0.5 using pennies. They started with 100 pennies and flipped all 100 pennies. Any pennies that landed on tails were removed. Then, the remaining pennies are flipped again and again the ones landing on tails were removed. The process is repeated until no pennies are left. How many flips is the most reasonable expectation for when this model should reach 0 pennies?
4 flips

8 flips

12 flips

16 flips

Answers

Answer: 8 flips

Step-by-step explanation:

8.3 + 3.4y - 0.5 (12y - 7)

Answers

Answer:

-2.6y + 11.8

Step-by-step explanation:

Distribute -0.5 into 12y and -7 to get to this equation, 8.3 + 3.4y - 6y + 3.5.  Combine the two like terms together to get your answer which is -2.6y + 11.8.

please help i m clusless

Answers

Answer:

-25+? = -5

cross -5 over and it the negative sign would turn to postive sign

-25+(5)=?

Therefore answer = 20

To confirm this answer

-25+20= -5

Answer: (1) 20 (2) -15 (3) -10

Explanation:
I know it’s late but hope this helps! ^^

Which class has a ratio of girls to total students of 7:10?
A. class with 3 boys and 7 girls
B. class with 7 boys and 3 girls
C. class with 7 boys and 10 girls
D. class with 10 boys and 7 girls

Answers

Answer:

A

Step-by-step explanation:

The total class is 10

the number of girls is 7

ratio of girls to total students - 7:10

1.9t-5 simplify using commutative property

Pls help lolll

Answers

Answer:

There is nothing to be further simplified. It is how you wrote it. Let me know if it was a mistake I'll edit my answer.

Step-by-step explanation:

Which equation represents the relationship between the x-and y-values shown in the table?

Answers

the second one because the exddddsedfffdffdggf
y=3x-4
7*3=21-4=17
5*3=15-4=11
3*3=9-4=5
2*3=6-4=2

what is the opposite of 7​

Answers

Answer:

-7 is the opposite of 7

Step-by-step explanation:

pls mark brainliest to help rank

!!! PLEASE PLEASE HELP ME , IVE BEEN STUCK ON THIS FOR SOO LONG. I SERIOUSLY NEED HELP.!!!

Using two or more complete sentences, describe how you can find a vector parallel to B = (-2,3) .

Answers

Answer:

To find a vector parallel to B, such vector must be a scalar multiple of B.

Step-by-step explanation:

Two non-zero vectors are parallel if they are scalar multiples of one another.

A vector parallel to B must be a scalar multiple of B.

let the vector parallel to B be A, then their scalar multiple is given as;

A = kB

A = k(-2, 3)

where;

k is scalar

Thus, to find a vector parallel to B, such vector must be a scalar multiple of B.

what linear equation in slope intercept from does this graph represent?​

Answers

Answer:

[tex]y = 16\frac{2}{3} x + 100[/tex] or [tex]y = \frac{50}{3} + 100[/tex]

Step-by-step explanation:

The equation of a line is [tex]y = mx + b[/tex], with [tex]m[/tex] being the slope and [tex]b[/tex] being the y-intercept.

We can see on the graph that the y-intercept, where the line crosses or touches the y-axis, is 100. So, our new equation is [tex]y = mx + 100[/tex].

Now we have to find the slope. Let's pick a point that's clearly on the graph. Perhaps (3, 150). And then we'll take the y-intercept point for convenience, (0, 100).

Then, we'll use [tex]\frac{y_{2} - y_{1}}{x_{2} - x_{1} }[/tex] to find the slope.

Let's substitute in our points.

[tex]\frac{150-100}{3-0}[/tex]

Simplify.

[tex]\frac{50}{3}[/tex]

Now, we can leave the slope like that or turn it into a mixed number. As a mixed number, your slope is [tex]16\frac{2}{3}[/tex].

We'll put that in our equation for a line and...bam!

[tex]y = 16\frac{2}{3} x + 100[/tex] or [tex]y = \frac{50}{3} + 100[/tex]

Solve for x: 24x + 12 = 16

Answers

Answer:

x=1/6 or x=0.1666666667

Step-by-step explanation:

How much is a medium pizza and garlic bread?

Answers

Answer:

$10.10

Step-by-step explanation:

$7.50 + $2.60 = $10.10

PLS HURRY I ll mark brainliest
Describe each as below sea level, at sea level, or above sea level.

Death Valley sits at an elevation of –282 feet.

The elevation of Mount Whitney is 14,494 feet.

The elevation of the Singapore Strait is 0 feet.

Answers

Answer:

Step-by-step explanation:death below ocean

Mount above

Singapore above

Step-by-step explanation:

A negative altitude is below sea level.

A positive altitude is above sea level.

An elevation of zero is at sea level.

Death Valley sits at an elevation of –282 feet.  negative: below sea level

The elevation of Mount Whitney is 14,494 feet.  positive: above sea level

The elevation of the Singapore Strait is 0 feet. zero: at sea level

What 12x12 I need help please help me

Answers

Answer:

144

Step-by-step explanation:

-0- Easy :D

What calculation is modeled on the number line?
Answer ASAP will give brainliest 55 points too plzz

Answers

the answer is C ,, can yu give me 55 points .

the correct answer is c !! hope this helps

pls help asap!! no trolls

Answers

Answer:

7

Step-by-step explanation:

а>12-6

the local water slides have 70 employees, of which 10% are temporary. how many temporary employees are there?

Answers

Answer:

7 employees

Step-by-step explanation:

Given that 10% are temporary .

So number of temporary employees will be 10% of 70 employees = 7employees ( Answer)

A person on a moving sidewalk travels 12 feet in 4 seconds. The moving sidewalk has a length of 120 feet. How long will it take to move from one end to the other?

Answers

Answer:

40 seconds

Step-by-step explanation:

120/12 = 10

10*4 = 40

THEREFORE 40 seconds to walk 120 feet at that speed

6x4 as repeated addition

Answers

Answer:

6+ 6+6+6

or

4+4+4+4+4+4

Step-by-step explanation:

6 (4 times)

4 (6times)

(brainlist please):D

Answer:

6+6+6+6   or 4+4+4+4+4+4

Step-by-step explanation:

You can add them out

Solve this pls. Thank you

Answers

Answer:

which one????????????????????

Write this multiplication expression using an exponent: 2 . 2 . 2 = ?

Answers

Answer:2^3

Step-by-step explanation:

please help me i’ll mark brainliest, comment, and rate 5 stars

Answers

Answer:

c...........................

Hi please help me answer this :)

Explain answer

Will give braisnlt

Answers

Answer:

There are no solutions

Step-by-step explanation:

No intersections or points that apply for the equations.

Any intersection between both lines is a solution. As these lines are parallel they have no solution. If they met at any point, 90 degree or not, there is  solution, the solution will be a point. If they are on the same line, hitting all the same points, the solutions are infinite.

An ant bed contains about 230 ants. If there are 6 of these beds on the playground, how many ants are there?​

Answers

Multiply number of ants per bed by number of beds.

230 ants x 6 beds = 1,380 total ants

the answer I got was 1,380

3.5x = 20 Round to nearest hundredths
place

Answers

Answer:

5.71

Step-by-step explanation:

x = 20/3.5 = 5.71

Elyse's cell phone plan allowes up to 8 GB of data each month. She received an alert that she used 95% of her Data. How much data does she have left​

Answers

Answer:

She has 400 megabytes left

Step-by-step explanation:

Evaluate the expression.
131 +-5

Answers

131+-5 is equal to 126
To make it less confusing it’s just 131-5

Answer:

126

Step-by-step explanation:

131 + - 5 can either be;

131 + 5 = 136

131 - 5 = 126

The question is probably asking what is 131 plus negative 5, hence the correct equation is; 131 - 5, and the correct answer is 126.

A school has a capacity of 965 students. If 541 students are already enrolled in the school, how many students remain? Round to the nearest ten.

Answers

Answer:

420 students

Step-by-step explanation:

965-541=424

round to the nearest ten and you get 420

i hope this helped, please mark this as brainliest! thanks

Answer:

The answer is 420

Step-by-step explanation:

You first do the equation 965 - 541. The answer to that is 424, but when you round it to the nearest ten, the answer would be 420.

For #4 is that the correct answer I just want to know before I submit it

Answers

The answer is 3 1/4 which is last choice

Is Sue´s answer correct? if not, why?

Answers

She distributed corrected.
She simplified correctly.
The solution is indeed none

Solution: Sue is correct

13 degrees below 0 pls

Answers

Answer:

-13

Step-by-step explanation:

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