To find how much money the average American family spends to cool their home, 100 Alaskan families are surveyed at random. Of the families, 85 said they spend less than $75.00 per month on cooling their homes. Based off that survey, the researcher concluded that the average AMERICAN family spends less than $75.00 per month on cooling their homes.

Is this conclusion valid or not valid?

Step-by-step explanation:

Statistically this is valid

But, in Alaska average daytime summer temperatures range from approximately 55 to 78 °F (12.8 to 25.6 °C); average daytime winter temperatures are about 5 to 30 °F (−15.0 to −1.1 °C). SO, they don't need cooling when compared to rest of the USA. Therefore this will not be valid.

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have

he has now walked a total of what?

if i know what this is maybe i can

step-by-step explanation: