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Examen
APES: Unit 6 Math Formulas Questions and Answers.
NuevoWhat is the basic unit of energy? - Answer Joule 
 
What are other units of energy? - Answer Calorie, kilojoule, British Thermal Unit (BTU) and therm 
 
What is power? - Answer Rate at which energy is used 
 
What is the basic unit of power? - Answer Watt 
 
What is the formula for power? - Answer P=E/t 
 
What is the formula for energy? - Answer E=Pt 
 
What is the formula for radioactive decay half life? - Answer N(t)=N₀ (½)^t/t½
Examen
APES Math Exam Review Questions and Answers
PopularAPES Math Exam Review Questions and Answers
Examen
Population Math Formulas- APES Questions and Answers.
NuevoPopulation Density - Answer total population/total area 
 
Birth Rate (as a %) - Answer (total births/total population) x 100 
 
Crude Birth Rate (per 1000) - Answer (total # of births/total population) x 1000 
 
Death Rate (as a %) - Answer (total deaths/total population) x 100 
 
Crude Death Rate (per 1000) - Answer (total # of deaths/total population) x 1000 
 
Population Growth Rate (r) - Answer (((births+immigration)-(deaths+emigration))/total population)...
Examen
APES Unit 1-9 Review Math Questions and All Correct Answers 2025-2026 Updated.
NuevoUNIT 1 - Answer The Living World, Ecosystems 
 
Divide 45.5 by 10 - Answer 45.5÷10 
= 4.55 
 
Divide 530.4 by 3.4 - Answer 530.4÷3.4 
= 156 
 
Divide 900 by 36,000 - Answer = 900/36,000 
= 0.025 
 
An old Honda Civic can go 348 miles on average before it runs out of gas. its tank holds 12 gallons of gas. What is the car's mpg? (miles per gallon) - Answer = 348miles/12gallons 
= 29 miles per gallon 
 
Find the average of the following numbers: 124, 456, and 785 ...
Examen
APES - Fall Final FRQ and Math Problems All Solved Correct 2025-2026 Updated.
NuevoChapter 1 Math Connection: 
If a made-up population has a crude birth rate of 39 and a crude death rate of 14, calculate the 
percent annual natural increase. 
Calculate the doubling time using the rule of 70. - Answer 2.5% 
39 births - 14 deaths/100 x 100% = 2.5% 
28 years 
DT = 70/2.5% = 28 years 
 
Chapter 1 Math Connection: 
Imagine that within a population of humans, there were 28 births per 1000 people (crude birth rate) and 10 deaths per 1000 people (crude death rate). 
Calculate th...
Examen
APES Math Practice Questions and Answers 2025-2026.
Nuevo2.5 - Answer The net primary productivity of an ecosystem is 1 kgC/m2/year, and the energy needed by the producers for their own respiration is 1.5 kgC/m2/year. The gross primary productivity of such an ecosystem would be __________________________kgC/m2/year 
 
0.5 - Answer The gross primary productivity of an ecosystem is 3.5 kgC/m2/year, and the energy needed by the producers for their own respiration is 3.0 kgC/m2/year. What is the net primary productivity of such an ecosystem? _...
Examen
APES Math Equations Study Guide 2025-2026 Updated.
NuevoChange - Answer new-old 
 
% change - Answer (new-old/old) x100 
 
Population density - Answer population/area 
 
birth rate per thousand - Answer births * 10^3 / population 
 
Death rate - Answer births * 10^3 / population 
 
Natural growth rate per thousand - Answer births-deaths * 10^3 /population 
or birthrate- deathrate 
 
% natural growth - Answer births-deaths/population * 10^2 
 
total growth as % - Answer (births + immigrants) - (deaths +...