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3 years ago

N+ 8.7 = 16.2 answer choices 6.5 7.5 8.5 24.9

Mathematics

1 answer:

sasho [114]3 years ago

3 0

<span>N+ 8.7 = 16.2
N = 16.2 - 8.7 =
N = 7.5
--------------
your answer is 7.5</span>

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Identify the following series as arithmetic, geometric, both, or neither. 3a + 3a² + 3a³ + . . . + 3an geometric arithmetic neit

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Answer:

solution

given=3a+3a^2+3a^3+....+...+...3an

first term(t1)=3a

second term(t2)=3a^2

third term(t3)=3a^3

for arithmetic mean ,d1=d2

d1=t2_t1=3a^2_3a=3a(a_1)

d2=3a^3_3a^2=3a^2(a_1)

here d1 is not equal to d2.

so it's not an arithmetic series.

Again,for geometric mean,r1=r2

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4 years ago

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3 years ago

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Aden spent $10 on a mug and then sold it, making 20% profit, how much did he sell the mug for

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Answer: $2

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3 years ago

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Answer:

Option D) There is sufficient evidence that the true population proportion is not equal to 70%.

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Number of people who agreed , x = 746

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This is a two-tailed test.

Formula:

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$z = \dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}$

Putting the values, we get,

$z = \displaystyle\frac{0.64-0.7}{\sqrt{\frac{0.7(1-0.7)}{1165}}} = -4.46$

Now, $z_{critical} \text{ at 0.02 level of significance } = \pm 2.33$

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Since, the calculated z statistic does not lie in the acceptance region, we fail to accept the null hypothesis and reject it. We accept the alternate hypothesis.

Thus, there is enough evidence to support the claim that the true proportion differs from 70%.

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