Write the sentence as an equation. 220 equals a minus 323

Kaylis [27]

I asssume we want to find the original price
so marked up 50% means if original price=100, then marked up price=50+100=150%

so
36.76=150%
hack, since 150=3 times 50 and 2 times 50=100, divide 36.76 by 3 then mutiply by 2

36.76=150%
divide both sides by 3
12.25333333333=50%
multiply both sides by 2
24.5=100%
original price=$24.50

4 0

4 years ago

If you want to construct a 90% confidence interval, what critical value (z*) should you use? Group of answer choices 2.576 1.960

Rom4ik [11]

Answer:

For this case we know that the confidence level is 90% so then the significance level is $\alpha=1-0.9 =0.1$ and $\alpha/2 =0.05$ . And we can find in the normal standard distribution a value who accumulates 0.5 of the area on each tail and we got:

$z_{\alpha/2}= \pm 1.645$

And the best option would be:

1.645

Step-by-step explanation:

We assume that the parameter of interest is $\theta$ and we can assume that the distribution for this parameter is normally distributed so then the confidence interval assuming a two sided interval is given by:

$\hat \theta \pm z_{\alpha/2} SE$

Where $\hat \theta$ represent the estimator for the parameter, SE the standard error and $z_{\alpha/2}$ the critical value.

For this case we know that the confidence level is 90% so then the significance level is $\alpha=1-0.9 =0.1$ and $\alpha/2 =0.05$ . And we can find in the normal standard distribution a value who accumulates 0.5 of the area on each tail and we got:

$z_{\alpha/2}= \pm 1.645$

And the best option would be:

1.645

6 0

3 years ago

A plane traveled 924 miles to Lagos and back. The trip there was with the wind. It took 11 hours. The trip back was into the win

ankoles [38]

Answer:84mph there and 42mph back

Step-by-step explanation:do 924 divided by 11 and 924 by 22

7 0

4 years ago

a basketball court is a rectangle that is 94 feet long the area is 4700 square feet what is the width of the basketball court