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
zimovet [89]
3 years ago
7

Carrie said "448 rounds to 500 because 448 rounds to 450 and 450 rounds to 500." Is she correct? Explain.

Mathematics
2 answers:
mestny [16]3 years ago
7 0

Answer:

no she is not correct because it would have to be 450 in order to round to 500

CaHeK987 [17]3 years ago
6 0

Answer: No she is not correct

Step-by-step explanation:

She is saying that 448 rounds to 500 but 448 actually rounds to 400

so it would going to have to be 450 or higher to round to 500

You might be interested in
A rocket is launched straight up from the ground with an initial velocity of 192 feet per second. The equation for the height of
Ivenika [448]

The equation for the height of the rocket at time t given

h= -16t^2+192t

We have to find the time t, when the rocket reaches 560 feet.

That means we have to find t when h = 560 ft. we will place 560 in the place of h to find t now.

h= -16t^2+192t

560 = -16t^2+192t

In the right side, we can check -16 is the common factor. So we will take out -16 from the rigbht side.

560 = -16(t^2 - 12t)

To get rid of -16 from the right side and move it to left side, we will divide both sides by -16.

560/-16 = -16(t^2-12t)/-16

-35 = t^2 -12t

Now we will move -35 to the righ side by adding 35 to both sides.

-35+35 = t^2-12t+35

0 = t^2 -12t+35

t^2-12t+35 = 0

We will factorize thee left side to find the values of t now. We need to find a pair of factors of 35 that by adding them we will get -12.

The pair of factors of 35 are -5 and -7 and by adding -5-7 we will get -12.

t^2-12t+35 =0

(t-5)(t-7) =0

So by using zero product property we will get

t-5 =0

t-5+5 = 0+5

t=5

Also t-7 =0

t-7+7 = 0+7

t=7

So we have got the rocket reaches at 560ft when t = 5 seconds and also when t = 7 seconds.

Now part b.

When the rocket completes its trajectory and hits the ground then the height or h = 0. So we will place h = 0 there in the equation.

h= -16t^2+192t

0= -16t^2 + 192 t

0 = -16(t^2-12t)

-16(t^2-12t) = 0

We will move -16 to the other side by dividing it to both sides.

-16(t^2-12t)/-16 = 0/-16

t^2-12t = 0

We will take out the common factor t from the left side. By taking out t we will get,

t(t-12) = 0

We will use zero product property now. By using that we will get,

t = 0

ans also t-12 = 0

t-12+12 = 0+12

t = 12

When the rocket completes its trajectory and hits the ground the time t can not be 0. When t =0, the rocket starts the trajectory.

So when the rocket completes its trajectory and hits the ground ,

then t = 12seconds.

So we have got the required answers.

6 0
3 years ago
What is 9/31 simplified?
astra-53 [7]
It cant be simplfied.
4 0
3 years ago
Read 2 more answers
Fred has 230 animals at his zoo. Grace at 349 more animals in her zoo than Fred has. how many animals do they have altogether? T
WARRIOR [948]

Step-by-step explanation:

okay so im in 8th grade and i just worked the problem out and i got , 809 ,

first you add 230 + 349 to see how much she has in her farm

she has 579, then you add 579 because she has that many , and he has 230 so you add 579 +230 and tou get 809

work:

230

+349

----------

579

+230

---------

809

hope i helped!!

4 0
3 years ago
Pls help I will give brainlest 22, 18, 14, 10, ...
natima [27]
I just did this my bad bro
4 0
2 years ago
B. The number of cats your teammates have as pets: 0, 1, 3,2
algol [13]

Ok so 1.2 is the answer you get if you divide them

and you can also say one because its counting by ones

7 0
3 years ago
Other questions:
  • 25h to the power of 10 +18
    8·1 answer
  • Carson made a four digit number with a 4 in th thousands place, a 4 in the on the ones place,a 5 in the tens place, and a 6 in t
    14·2 answers
  • I need to know this answer I've worked it out but not sure
    8·2 answers
  • A rectangle has a perimeter of 43feet and width of 7 feet. Find the length
    8·2 answers
  • Plz help I might get a F A marching band has 4 rows of trumpets with 10trumpeters in each row.how many trumpeters are in the mar
    8·2 answers
  • Can someone please help ASAP will give brainliest
    9·1 answer
  • Passes through (-3, 1) and perpendicular to x=0
    12·1 answer
  • Suppose 123 people voted for Danny if 55 of the votes were from girls what would be the ratio of votes from girls to vote from b
    12·2 answers
  • Solve the equation q/1.6=5
    14·2 answers
  • If 5/6 is 180, what is 1/6?<br>(please explain as well)
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!