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podryga [215]
3 years ago
14

Is the sequence geometric ? -48,96,-192,384...

Mathematics
1 answer:
Lunna [17]3 years ago
4 0

Answer:

yes

Step-by-step explanation:

If the sequence is geometric then the common ratio r between consecutive terms will be equal.

\frac{96}{-48} = - 2

\frac{-192}{96} = - 2

\frac{384}{-192} = - 2

The common ratio between terms = - 2

Hence the sequence is geometric

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What is the probability that a student selected at random is a boy?
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Answer:

Pr(B) = 0.69

Pr(J/B) = 0.35

Pr(J∩B) = 0.14

Pr(G/J') = 0.66

Pr(G) = 0.31

Step-by-step explanation:

Applying,

Pr = possible outcome (a)/Total outcome(t)

(1) Pr(B) = a/t............ Equation 1

From the diagram

Given: a = 220+65+35 = 320, t = 220+65+35+145 = 465

Substitute these values into equation 1

Pr(B) = 320/465

Pr(B) = 0.69

(2) Pr(J/B) = (35+65)/(220+65)

Pr(J/B) = 100/285

Pr(J/B) = 0.35

(3) Pr(J∩B) = 65/465

Pr(J∩B) = 0.14

(4) Pr(G/J') = 145/220

Pr(G/J') = 0.66

(5) Pr(G) = 145/465

Pr(G) = 0.31

8 0
3 years ago
A DNA molecule that is produced by combining DNA from different sources or organisms is called A) marker DNA. B) polymerase DNA.
AlekseyPX
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6 0
4 years ago
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The measure of central angle ABC is pi/2 radians.<br><br> What is the area of the shaded sector?
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3 years ago
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3 0
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