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 .

cut 138 centimeters off

step-by-step explanation:

250-112 = 138

geometry: triangles

solvers

lessons

answers archive

call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

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