Mr. henry buys a car for $18,000. the value of the car decreases about 15% each year. after 4 years, what will be the value of the car? a) about $2,700 b) about $9,400 c) about $10,800 d) about $15,300

The value of the car after four year is $9396.108 .

Option (b) is correct i.e about $9400 .

Step-by-step explanation:

The exponential decreasing function is given by

Where a is the initial value , r is the rate of interest in decimal form and t is the time in years .

As given

Mr.henry buys a car for $18,000. the value of the car decreases about 15% each year. after 4 years .

a = $18000

15% is written in the decimal form .

= 0.15

t = 4 years

Putting all the values in the formula

y = $9396.108

Therefore the value of the car after four year is $9396.108 .

Option (b) is correct i.e about $9400 .

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.