Jlvesh is analyzing the flight of a few of his model rockets with various equations. In each equation, h is

the height of the rocket in centimeters, and the rocket was fired from the ground at timet = 0, where t is

measured in seconds.

Jivesh also has a more powerful Model B rocket. For this rocket, he uses the equation h=-90t4 + 300t.

When is the height of the Model B rocket 250 centimeters? Round your answers to the nearest

hundredth.

After t =

seconds, the rocket will have reached a height of 250 centimeters.

Answers

Answer 1

Answer:

After t =  1.67 seconds, the rocket will have reached a height of 250 centimeters.

Step-by-step explanation:

Given

[tex]h = -90t^2 + 300t[/tex] --- correct expression

Required: When does height = 250 cm

To do this, we have:

[tex]h = 250[/tex]

This gives:

[tex]250 = -90t^2 + 300t[/tex]

Rewrite as:

[tex]90t^2 - 300t + 250 = 0[/tex]

Divide through by 10

[tex]9t^2 - 30t + 25 = 0[/tex]

Expand

[tex]9t^2 - 15t - 15t + 25 = 0[/tex]

Factorize:

[tex]3t(3t - 5) -5(3t - 5) = 0[/tex]

[tex](3t - 5)(3t - 5) = 0[/tex]

This gives:

[tex]3t - 5 = 0[/tex]

Solve for 3t

[tex]3t = 5[/tex]

Solve for t

[tex]t = \frac{5}{3}[/tex]

[tex]t = 1.67s[/tex]


Related Questions

Delta math question —-

Answers

Answer:

21

Step-by-step explanation:

I think its 21, because the BD line divides the big triangle into 2 ones and they are equilateral triangle, sorry if I'm wrong

Answer:

BD = 21

Step-by-step explanation:

The sector divided AC into two equal pieces and since this is a right triangle the height of the triangle BD is equal to half of the base

(21+21) / 2 = x

42 / 2 = x

21 = x

A circular hot spring has a diameter of 96 meters. Over time, the diameter of the spring decreases by 8 meters. By hou
many square meters does the area of the hot spring decrease? Use 3.14 for it.


Answers

Answer:

the area decreases by 1155.52 square meters

What are the degree and leading coefficient of the polynomial?

Answers

look up the answer on the app socratic, yw

Which is the simplified form of p⁰?
O p
O 1/p
O 0
O 1​

Answers

Answer:

It is p = 1

Step-by-step explanation:

p⁰=1 because it is basically saying and when simplifying fractional exponents we can flip the bottom exponent up to the top if we change the sign, leaving us with : (p⁵-p⁵)=p⁰

Find the sum or type
“impossible"
Help Resources
[1 -2 1] + [4 -5 -6]
Skip
[[?]
Enter

Answers

Answer:

-7

Step-by-step explanation:

looked on photomath

used to have a square garage with 296 ft of floor space. recently built an addition to it. The garage is still a​ square, but now it has​ 50% more floor space. What was the length of one side of the garage​ originally? What is the length of one side of the garage​ now? What was the percent increase in the length of one​ side?

Answers

Answer:

230 ft

Step-by-step explanation:

25 ft 8 yd 11 in.
Which is greater?

Answers

Answer:

25 ft

Step-by-step explanation:

8 yd = 24 ft

11 in < 1 ft

8 yd < 25 ft

can ya find the area of this triangle

Answers

[tex]\sf \:Formula \: to \: find \: the \: area \: of \: a\: triangle \: = \boxed{\boxed{\bf \frac{1}{2} \times b \times h}}[/tex]

___________________

[tex]\sf \: b = 6 \: in. \\ \sf \: h = 6 \: in.[/tex]

___________________

[tex]\sf \: Area \: \hookleftarrow \\ \sf \: = \frac{1}{2} \times b \times h \\ \sf \: = \frac{1}{2} \times 6 \times 6 \\ = \sf \frac{1}{\bcancel2} \times{ \bcancel36 } \\ \sf =\underline{\bf 18 \: in ^{2} .}[/tex]

Which statement is true?
b
оооо
All quadrilaterals have at least 1 pair of parallel sides.
Parallelograms have 2 pairs of congruent angles.
A rhombus is a rectangle. -
A trapezoid is a parallelogram.


Helpp plzzzz

Answers

Answer:
The first one, all quadrilaterals have at least 1 pair of parallel sides

NEED HELP WITH THESE

f(x)=x^2-x+1
g(x) = 5 - 3x

Evaluate the following.
1) f(-1)
2)g( -8)
3)f( 1)
4) g(5)
5) f(3)
6) g(-3)

Answers

Step-by-step explanation:

1 .f(x)=[tex]x^{2}[/tex]-x+1

   f(-1)= (-1)-(-1)+1

   f(-1)= 1+1+1

      = 3

3.f(x)=[tex]x^{2}[/tex]-x+1

 f( 1)=(1)-1+1

  f( 1)=1-1+1

        =1

5. f(x)=[tex]x^{2}[/tex]-x+1

    f(3)=[tex](3)^{2}[/tex]-3+1

         = 9-3+1

          =7

2. g(x) = 5 - 3x

 g( -8)=5-3(-8)

g( -8)=5+24

        =29

4.g(x) = 5 - 3x

g(5)=5-3(5)

 g(5)=5-15

       =-10

6.g(x) = 5 - 3x

   g(-3)=5-3(-3)

 g(-3)=5+9

         =14

What’s the answer????(i will mark whoever answers the question right as Brainelist)

Answers

Bob was enrolled in yoga classes for 1 year = 12 months

Plssss helpppp and thank you so so much

Answers

Answer:

8

Step-by-step explanation:

slope = change in y over change in x

as y goes up 8, x goes up 1

slope = 8/1 or just 8

During his past seven basketball games, Manuel scored 35, 37, 43, 47, 52, 29, and 31 points respectively. Therefore, his mean number of points per game was 39.14.

What did calculating that number tell him about his game?
A.
Manuel would know that he will make at least 39 points per game in the future.
B.
Even though Manuel does not score exactly 39 points in every game, he tends to score on average 39 points per game.
C.
Manuel would know that he will make at most 39 points per game in the future.
D.
Manuel would know that both he and his teammates will contribute an average of 39 points each per game.

Answers

B. It’s the average. Not a definite 39 points

HEY CAN SOMEONE HELP ME WITH MY LASTEST MATH QUESTION I WILL GIVE BRAINLIST PLEASE :)))

Answers

Answer:

I would love to help!!

Step-by-step explanation:

Please Answer! I will give brainiest. The Picture is down below :)

Thank You!

Answers

Answer:

there's no pic!..............

What is the length of the missing leg?45 and 36

Answers

Answer:

27

Step-by-step explanation:

If this is a right angle triangle, we will do this.

45^2 - 36^2 =

√729 = 27

Therefore, the missing leg = 27

Hope that helps!

geometry ^
please help me

Answers

2.99

by process of a elimination it can’t be the bottom two since the object is getting larger. If you take 6.21/5.4 you end up with 1.15. So now if you take 2.99/2.6 it also equals to 1.15.

Let f(x)=x^2+2 and g(x)=1-3x Find each function value. f(g(-4))

Answers

Answer:

171

Step-by-step explanation:

First you plug -4 into the g(x) equation

g(-4)= 1-3(-4)

Use pemdas

g(-4)= 1+12

g(-4)= 13

Next you plug 13 into the f(x) equation

f(13)= 13^2 + 2

First you do 13^2=169

Add 2 and you get 171

In ATUV, the measure of V=90°, TU = 5.4 feet, and VT = 1.6 feet. Find the measure
of ZT to the nearest degree.
U
5.4
хо
V
1.6
Answer:
Submit Ang

Answers

Answer:73

Step-by-step explanation:

Evaluate f(x) = 2|x – 5| for f(–5) and f(0).

f(–5) = –20, f(0) = –2

f(–5) = 10, f(0) = 0

f(–5) = 20, f(0) = 10

f(–5) = 12, f(0) = 5

Answers

Answer:

f(–5) = 20, f(0) = 10

Step-by-step explanation:

f(-5):

f(-5) = 2|-5 -5|

f(-5) = 2|-10|

f(-5) = 2(10)

f(-5) = 20

f(0):

f(0) = 2|0 - 5|

f(0) = 2|-5|

f(0) = 2(5)

f(0) = 10

Circle M has a radius of length 5 inches. A tangent is drawn from exterior point Q to point N on circle M as shown. If QN= 11 inches, determine the measure of

Answers

Answer:

look at the box did you see it

Answer:

I hope you are wanting the measure of QM

QM = 12.08 in

Step-by-step explanation:

Because a tangent to a radius forms a 90° angle, use the Pythagorean theorem:

QM² = MN² + QN² = 5² + 11² = 25 + 121 = 146

QM = √146 = 12.08 in

HELLLLLLLPPPP PLZZZZZZZZZZZZ THIS IS A TEST

Answers

Answer:

76%= Decimal: 0.76 and proportion 76%

Step-by-step explanation:

Answer:

Decimal=0.76 proportion=76%

Step-by-step explanation:

19/25 let's find the decimal first

long division:

25|19

25 goes into 1, 0 times so;

    0

25|19

   -0

     19

25 goes into 19 0 times so;

    00.

25|19.0

   -0

     19

     -0

     190

25 goes into 190 7 times so;

    00.7

25|19.00

   -0

     19

     -0

     190

    -175

       150

25 goes into 150  6 times so;

    00.76

25|19.00

   -0

     19

     -0

     190

    -175

       150

      -150

           0

now 19/25 as a proportion;

19........x

---- = ------

25.....100

25*4=100 so 19*4=x

19*4=76 so x = 76

and 76/100=76%

Will give brainliest. A square and a rectangle have the same perimeter. The square has a side length of 8x units. The rectangle has a length of (4x + 8) units and a width of 10 units. What will be the perimeter of both the rectangle and the square? ​

Answers

To get the perimeter of a square you take it’s side length times 4. To get the perimeter of a rectangle you take 2 times it’s length and 2 times it’s width and add the product together. So the formula is for square is 4L = P
The formula for rectangle is 2L + 2W = P
If you know the perimeter of a square and rectangle are the same you can set the equations equal to each other.
So 2L + 2W = 4L and since you know the side measurements. You sub them in.
2(4x + 8) + 2(10) = 4(8x) and then solve for x

X = 3/2

Pete pumps water into an empty pool. After 8 minutes, there are 40 gallons o water in the pool. Use the coordinate plane provided to plot two points that can be used to represent the relationship between time, x, and the total amount of water, y, in the pool. Select the places on the coordinate plane to plot the points​

Answers

Answer:

(2,10) (4,20) (6,30) (8, 40)

Step-by-step explanation:

every minute, the pool fills up with 5 gallons.

if you look at the points, you will see a pattern

here is a step by step example

Can I have some help with this math? Pls hurry, I will mark brainliest

Evaluate the expression 4² – 25−−√ .

Answers

Answer:

That would be Negative nine

The given expression is evaluated as -12.

What is an expression?

An expression is a combination of terms that are combined by using mathematical operations such as subtraction, addition, multiplication, and division.

The given expression is 4²-25-√9

Now, 16-25-3

= 16-28

= -12

Therefore, the given expression is evaluated as -12.

To learn more about an expression visit;

https://brainly.com/question/28170201.

#SPJ2

"Your question is incomplete, probably the complete question/missing part is:"

Evaluate the expression 4²-25-√9.

PLZ HELP I NEED TO TURN THIS IN IN 10 mins

Answers

the answer is 2 because if you arrange them 2 in in the middle

Answer:

2 or 4 because it's in the middle I think 2

Step-by-step explanation:

hope this helps have a good rest of your night/day :) ❤

can I please get brainliest if correct only got like 4 pls

I have to find the missing angles​

Answers

Answer:

11 & 12 = 19⁰

13 = 71⁰

14, 15, 16 & 17 = 90⁰

18 & 20 = 78⁰

19 = 12⁰

Step-by-step explanation:

14,15,16 and 17 are formed from perpendicular lines. They are not counted as angles for the kite because, the are in the middle of the kite, not at the side...

You can easily find the angles using the triangle angles formula...to find 12,

180 - 90 - 71 = 19

To find 20 & 18, with the same method,

180 - 90 - 12 = 78

List the nurnbers in order from least to greatest. 1 -1,8,-18,-5,2,1 The numbers in order from least to greatest are​

Answers

-18,-5,-1,1,1,2,8 Hope this helps!

What is the value of 2x2 when x = 1.5?



15.0


4.45


4.50


450

Answers

Answer: 4.50 look at the picture

Step-by-step explanation: Hope this help :D

Step-by-step 4.5 ....................

the ravens scored 1 touchdown and an extra point . how many total points did they score

Answers

the ravens scored 7 points
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