The width of a rectangle is 1.9 feet. The perimeter is 7.4feet. What is the length?
1 answer:
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For this you have to make two proportions that are and set them equal to each other.
The first proportion represents the percent of people who like silver as their favorite car color
Since this is a circle graph the whole will always be 100 because percents are always taken out of 100
The part would be 10 because only 10% out of the 100% like silver
The second proportion is the people that represent the response.
350 would be the whole because that is the total amount of people surveyed
The part is unknown and what you are solving for.
Here is how the proportion should look like:
Cross multiply (If you don't know what this is look at the image below to see my work)
The cross multiplication will give you:
3500 = 100x
Isolate x by dividing 100 to both sides
3500/100 = 100x/100
35 = x
This means that 35 people out of the 350 surveyed like silver cars
Hope this helped!
Answer:
And we can find the probability with this difference:
Step-by-step explanation:
For this case we have the following info given:
represent the sample size
the proportion of interest
We want to find the following probability:
We can use the normal approximation for this case since np >10 and n (1-p) >10
For this case we know that the distribution for the sample proportion is given by:
And we can use the following parameters:
And we can apply the z score formula given by:
And using this formula we got:
And we can find the probability with this difference:
Answer:
294 cm^2.
Step-by-step explanation:
where A = area, h = height and a and b are the lngths of the 2 bases.
So
= 7*42
= 294 cm^2.