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gavmur [86]
3 years ago
12

Determine the kinetic energy of a 1000 kg roller coaster car that is moving with a speed of 20.0 m/s

Mathematics
1 answer:
Vedmedyk [2.9K]3 years ago
3 0
KE = 0.5*m*v2 KE = (0.5) * (1000 kg) * (20 m/s)2
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30 points!!
Sedbober [7]

Answer:

1. 18e + (-6e) = 12e

2. 0x - (-21x) = 21x

3. 90z + (-10z) = 80z

5 0
3 years ago
Read 2 more answers
How do you delete answers?
Gekata [30.6K]

Answer:

????????.......?????????????????

if we asked questions and somone just ans the question wrongly for free points

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3 0
3 years ago
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Plz help me and explain how you got your answer thx
mixas84 [53]

Answer:

The correct answer would be C = 533,800

Step-by-step explanation:

The formula for circumference is C = 2πr. To find the radius you must divide the diameter by 2.

Radius = 85000

now we have C = 2 * 85000 * 3.14

C = 533,800

<em>Scientific Formula = 5.338 x 10^6</em>



5 0
3 years ago
A geometric sequence is defined by the equation an = (3)3 − n.
Delvig [45]
PART A

The geometric sequence is defined by the equation

a_{n}=3^{3-n}

To find the first three terms, we put n=1,2,3

When n=1,

a_{1}=3^{3-1}

a_{1}=3^{2}

a_{1}=9
When n=2,

a_{2}=3^{3-2}
a_{2}=3^{1}

a_{2}=3

When n=3

a_{3}=3^{3-3}

a_{3}=3^{0}
a_{1}=1
The first three terms are,

9,3,1

PART B

The common ratio can be found using any two consecutive terms.

The common ratio is given by,
r= \frac{a_{2}}{a_{1}}
r = \frac{3}{9}

r = \frac{1}{3}

PART C

To find
a_{11}

We substitute n=11 into the equation of the geometric sequence.

a_{11} = {3}^{3 - 11}

This implies that,

a_{11} = {3}^{ - 8}

a_{11} = \frac{1}{ {3}^{8} }

a_{11}=\frac{1}{6561}
4 0
3 years ago
Simplify the sum. (2u^3 + 6u^2 + 2) + (7u^3 – 7u + 4)
kolezko [41]

Answer:

When adding polynomials you've got to combine all like terms

2u^3 + 7u^3= 9u^3 (They both are raised to the third with the same variable.)

6u^2 (Stays the same because there are no other numbers that are raised to the second)

-7u (Again there are no other numbers to combine this with)

2+4=6 (Add 2+4 as normal)

Now you put together all the numbers that are left for your final answer

9u^3+6u^2-7u+6

Hope this helps ;)

6 0
3 years ago
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