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3 years ago

NEED HELP!!!!!!!!!!

1 answer:

7 0

Number one is (saturated) number two is (solvent) number three is (b and c) number four is (element) number five is ( no more solvent can be dissolved)

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Factor completely 2x^2 +6x -108

never [62]

Answer:

2(x-6)(x+9)

Step-by-step explanation:

5 0

3 years ago

in a given year, the rate of flu infection for the general public was 8.3%. And sample of 200 people who receive the flu vaccine

makkiz [27]

Answer:

$\fbox{\begin{minipage}{10em}Option A is correct\end{minipage}}$

Step-by-step explanation:

Step 1: Define significance level

In this hypothesis testing problem, significance levels α is selected: $0.05$ , the associated z-value from Laplace table:

Φ( $z$ ) = α - $0.5 = 0.05 - 0.5 = -0.45$

=> $z$ = $-1.645$

Step 2: Define null hypothesis ( $H_{0}$ ) and alternative hypothesis ( $H_{1}$ )

$H_{0}$ : rate of flu infection $p$ = 8.3% or 8.3/100 = 0.083

$H_{1}$ : rate of flu infection $p$ < 8.3% or 8.3/100 = 0.083

Step 3: Apply the formula to check test statistic:

$K = \frac{f - p}{\sqrt{p(1 - p)} } * \sqrt{n}$

with $f$ is actual sampling percent, $p$ is rate of flu infection of $H_{0}$ , $n$ is number of samples.

The null hypothesis will be rejected if $K < z$

Step 4: Calculate the value of K and compare with $z$

$K = \frac{(\frac{3.5}{100}) - 0.083}{\sqrt{0.083(1 - 0.083)} } * \sqrt{200} = -2.46$

We have $-2.46 < -1.645$

=>This is good evidence to reject null hypothesis.

=> The actual rate is lower. (As $H_{1}$ states)

Hope this helps!

5 0

3 years ago

Eli's Bakery recently spent a total of $91 on new equipment, and their average hourly operating costs are $6. Their average hour

skelet666 [1.2K]

Answer:

this is your answers for

Step-by-step explanation:

8hrs and both equal

5 0

3 years ago

an eagle leaves her nest on the side of a cliff. she soars upward 60 ft and then dives 80 ft. what is her change in elevation af

labwork [276]

Her change is -20ft.

5 0

3 years ago

01:36:08

Angelina_Jolie [31]

Answer:

check online for more information

7 0

2 years ago