SAT Math: Recognizing the Significance of an Exponent in a Word Problem

be in units of years since the problems said the

rate of growth is annual and the whole exponents tells

us how many times we apply the rate of growth

Why to the starting value like experiments are all about

the times you compound something So if you see a

financial investment it's one plus point Oh eight minutes going

to grow at eight percent a year you're going to

see it written like that one plus point Oh wait

to whatever power like the seventh power means going compound

for seven years at eight percent and be whatever it

is at the end So in this case looking at

are jumbled arrangement of terms The fractions E over three

means that each year the population grows by one third

of the growth rate So actually it is A In

a short three years the population will grow by a

nice even Why on Hey we know that the growth

rate is two percent so you know that's why it's

gotta be a there right So if it really did

take one third of the year for the population to

grow wealthy exponents would be three Z Then he's gonna

work for B there This is the same as population

growing by two percent three times a year So get

rid of D An annual growth by two thirds of

a percent would require whitey equal point zero zero six

six seven in an exponents of just see So it

ain't any of those It's a It takes three years

for the population to grow by two percent It sounds 00:01:39.59 --> [endTime] like a really sleepy town