Match each percent expression to its simplified form.

Mathematics

2 answers:

antoniya [11.8K]2 years ago

7 0

Answer:

Step-by-step explanation:

a)11.25

b)68.6

c)27.9

d)43.56

yulyashka [42]2 years ago

4 0

Answer:

Step-by-step explanation:

1) 15% of 75 = (15/100) * 75 = 0.15*75 = 11.25

2) 7% of 980 = 0.07 * 980 = 68.6

3) 45%of 62 = 0.45 * 62 = 27.9

4) 22% of 198 = 0.22 * 198 = 43.56

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Answer:

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Step-by-step explanation:

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insurance company checks police records on 559 accidents selected at random and notes that teenagers were at the wheel in 91 of

ss7ja [257]

Answer: $(13.22\%,\ 19.34\%)$

Step-by-step explanation:

Given : Sample space : n= 559

Sample proportion : $\hat{p}=\dfrac{91}{559}=0.162790697674\approx0.1628$

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Significance level : $\alpha= 1-0.95=0.05$

Critical value : $z_{\alpha/2}=1.96$

Confidence level for population proportion:-

$\hat{p}\pm z_{\alpha/2}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}\\\\=0.1628\pm (1.96)\sqrt{\dfrac{0.1628(1-0.1628)}{559}}\\\\=0.1628\pm0.030604971367\\\\\approx 0.1628\pm0.0306=(0.1322,\ 0.1934)=(13.22\%,\ 19.34\%)$