15. An electric can opener is worth 38 dollars when it is new. After each year it is worth half what it was the previous year. What will its worth be after 4 years? Round your answer to the nearest cent.
$4.19
$4.75
b. $1.19
d. $2.38
a.
c.

d. $2.38

Step-by-step explanation:

Exponential decay function: , where A = initial value

x= Time mperiod

b = multiplicative decay rate

As per given, we have

A = 38 dollars

b= 0.5

Amount after x years :

Then, at x= 4

Amount after 4 years :

Hence, the worth of electric can opener after 4 years = $2.38.

So, correct option is d. $2.38

for finding the midpoint of any given 2 pair of points simply add the respective x coordinates with other x coordinate and the y coordinate with other y coordinate and divide them by 2

in your question it will be :

(3+1)/2 for the x coordinate of mid point i.e 2

[8+(-4)]/2 for the y coordinate of midpoint i.e 2

so coordinates of mid point of points (3,8) and (1,-4) will be (2,2)

entering that problem on the tube might get you an answer