SAT Math · Study & Practice

Financial Mathematics

Financial mathematics applies percentages and growth to money: interest, compounding, depreciation and repayments. This chapter covers simple interest, compound interest, growth models, depreciation, loans and installments. Read each topic, work the problems with the hint ladder, then take the 8-question topic test.

Topics

1 Interest 4 worked · 5 practice · 8-Q test Start → 2 Compound Interest 4 worked · 5 practice · 8-Q test Start → 3 Growth Models 4 worked · 5 practice · 8-Q test Start → 4 Depreciation 4 worked · 5 practice · 8-Q test Start → 5 Loans 4 worked · 5 practice · 8-Q test Start → 6 Installments 4 worked · 5 practice · 8-Q test Start →

Chapter test

📝 Financial Mathematics — Chapter Test

25 fresh questions · timed · full solutions

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Formula Reference Sheet

This chapter

Interest

Simple interest	I = P × r × t
Compound amount	A = P(1 + r)^t
Rate as decimal	r% means r ÷ 100

Value over time

Growth	A = P(1 + r)^t
Depreciation	A = P(1 − r)^t
Installments total	number of payments × payment

Digital SAT reference

Area & Circumference

Circle area	A = πr²
Circle circumference	C = 2πr
Rectangle	A = ℓw
Triangle	A = ½ b h

Volume

Rectangular box	V = ℓwh
Cylinder	V = πr²h
Sphere	V = 4⁄3 πr³
Cone	V = 1⁄3 πr²h
Pyramid	V = 1⁄3 ℓwh

Right triangles

Pythagorean theorem	a² + b² = c²
30°–60°–90°	sides x : x√3 : 2x
45°–45°–90°	sides s : s : s√2

Constants

Degrees in a circle	360°
Radians in a circle	2π
Angles of a triangle	sum = 180°