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

3/4 ÷ 3/4

step-by-step explanation:

basically divide any proper fraction with itself to fit the criteria.

so if we are using 3/4, then:

3/4 ÷ 3/4 = 1

so 1 is the quotient.

and the numerators for both these fractions is 3.   and if we divide the numerators:

3 ÷ 3 = 1

we see that quotient is equal to our original quotient as well.