3. Google is trying to estimate the market size for the upcoming launch of the Pixel 4a smartphone. a. Use the chain-ratio method to estimate the number of Pixel 4a phones that will be sold using the following data. The population of the United States is 325 million people. 92% of Americans have cell phones. 74% of cell phones in the US are smartphones. 54% of smartphones in the US are iOS-type phones. 45% of smartphones in the US are Android-type phones. The remaining 1% run Windows, Blackberry, or another operating system. The Pixel 4a will be an Android phone. Google’s Pixel 3 phone has a 5% market share among Android phones. They estimate a similar percentage for the Pixel 4a. Finally, they assume each person who purchases a phone will not purchase more than 1. How many Pixel 4a phones should Google expect to sell?

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

step-by-step explanation:

to find if any function is an inverse of the other, put the first equation in as x in the next one. then simplify and solve. if at the end you get the statement y = x, then it is an inverse. if you get anything else, it is not.

∈3,600

step-by-step explanation:

the area of a triangle is determined by the formula: base x height * 1/2

you'll need to assign a base to the triangle. based on the vertices given, the simplest base would be the line segment from (-2,1) to (2,1). the distance between any two numbers is found by just subtracting them. here, you should subtract the x values to find the distance of this side.

2 - (-2) = 4.

so the distance (aka the length of the base) is 4. the height of the triangle is the distance between the base and the highest point on the triangle which is (3,4). we should subtract the y values this time to find the height/distance.

4 - 1 = 3

so the height is 3.

base = 4

height = 3

hope this if needed hmu