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DochEvi [55]
2 years ago
13

Please help, I can't figure this out.

Mathematics
1 answer:
nataly862011 [7]2 years ago
4 0

Answer:

5 seconds

Step-by-step explanation:

When the rocket is on the ground, then h = 0 , that is

- 6t² + 30t = 0 ← factor out - 6t from each term

- 6t(t - 5) = 0

Equate each factor to zero and solve for t

- 6t = 0 ⇒ t = 0 ← when rocket is launched

t - 5 = 0 ⇒ t = 5 ← time when rocket returns to ground

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What are the relative frequencies, to the nearest hundredth, of the rows of the two way table?
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Group B        0.45      0.55

Step-by-step explanation:

Since we have given that

Number of people of A in Group A = 15

Number of people of B in Group A = 45

Number of people of A in Group B = 20

Number of people of B in Group B = 25

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Total number of people in Group B = 20+25 = 45

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Relative frequency of A in Group A is given by

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Relative frequency of B in Group A is given by

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