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MArishka [77]
3 years ago
14

A questionnaire has determined that 20% of the residents of Flaugamuck County own an iPod. Furthermore, 80% of these iPod owners

are under 30 years of age, whereas 20% are 30 or older. Only 35% of the people who don't own iPods are under 30 years of age. What percentage of the residents who are 30 or older own iPods?
Mathematics
1 answer:
nydimaria [60]3 years ago
5 0

Answer:

P = 7.14%

The percentage of those 30 years or older that own an ipod is 7.14%

Step-by-step explanation:

Given;

Percentage of ipod owners Pi = 20%

Percentage who don't own ipod Pd = 100-20 = 80%

For age 30 or older;

Percentage of ipod owners who belong to this group

Po = 20% of Pi

Percentage who don't have an ipod but belong to this group Pu = 100-35% = 65% of Pd

The percentage of those 30 years or older that own an ipod is;

P = Po/(Po+Pu) × 100%

Po = 20% of Pi = 20% of 20% = 0.2×20 =4%

Pu = 65% of Pd = 65% of 80% = 0.65×80% = 52%

Substituting the values;

P = 4/(4+52) × 100%

P = 7.14%

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yuradex [85]

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Given four equations : 1)y=3^{x} -4, 2) y=2(4)^{x}, 3) y=3^{x}/2, 4) y=6(1/3)^{x}.

Equation is relationship between two or more variables expressed in equal to form. Equations of two variables look like ax+by=c. Exponential equation look like a^{x}.

Decay means when x value increases ,the y value decreases.

We haveto put 3 values for x in the equations to check.

1)y=3^{x} -4

put x=0,y=-3

put x=1, y=-1

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2) y=24^{x}

put x=0,y=2

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3) y=3^{x}/2

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put x=0,y=6

put x=1, y=2

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Yes ,it represents exponential decay.

Hence the equation which represents exponential decay is y=6(1/3)^{x}.

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4 0
1 year ago
The graph of f(x) = x2 + x - 6 is shown below.
guapka [62]

Answer:

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