Answer:
$471.65
Step-by-step explanation:
-The value of the laptop after each year is calculated by the formula:

where:
is the value at time t
is the initial value
is the rate of depreciation
is the time
#We substitute the values to solve for the value after 3 years(2010-2007=3):

Hence, the value of the laptop in 2010 is $471.65
500 (non smokers)÷ 25(random students out of the group)= 20 inches.
20 inches ÷ 74 inches= 3.70
First we find the measurement of dark dot .
ANd for that we have to use the formula of the angle formed by the intersection of chord .
Let the dark dot be t.
So we have

t and z are linear pair and sum of angles of linear pair =180 degree.
So we get

3÷2= 1.5
To make sure if it's correct,
1.5
x2
__
3.0
The slope intercept form is y=mx+b. m is the slope, b is the y intercept,