Mathematics for IGCSE & O level - Percentages (Section 4 - No. 15)
An item's value decreases by 15% each year. If the original value is $1400, what is the value after 4 years?
$725.00
$728.05
$730.00
$740.00
설명
A = P(1 - r/100)^n, where P = 1400, r = 15, and n = 4. A = 1400 * (1-15/100)^4 = $728.05.