Exponentials Algebra

You put $4000 into an account with 1.4% interest compounded annually. Which equation shows balance after 2 years.

• A = 4000(1 - 0.014)²

• A = 4000(1 + 0.014)²

• A = 4000(1 - 1.4)²

• A = 4000(1 + 1.4)²

A = 20000(0.88)^x which statement best describes rate of change

• decreases 88%

• decreases 12%

• increases 88%

• increases 12%

Answer explanation

decay because .88 less than 1

do 1-.88=.12 and move decimal right twice to get 12%

Tags

CCSS.HSF-IF.C.8B

y = 10000(.95)^x. Which value is the y-interecept and what does it represent?

• 0.95, the percent initially

• 0.95 the percent after x years

• 10000 the amount initially

• 10000 the amount after x years

Answer explanation

number in front (not decimal attached to exponent). Is initial amount

Tags

CCSS.HSF.LE.B.5

In a tournament half players eliminated after each round. Start with 128 players. Which equation shows number left after 3 rounds?

• y = 128(1 - .5)³

• y = 128(1 + .5)³

• y = 128(1 - .3)⁵

• y = 128(1 + .3)⁵

Answer explanation

half eliminated is .5 decreasing

The table contains some points on a graph of an exponential function. Based on the table, which function represents the same relationship?

• f(x) = 3(4)^x

• f(x) = 2(4x)

• f(x) = 4(.02)^x

• f(x) = 2(4)^x

Tags

CCSS.HSF.LE.A.2

Tags

CCSS.HSF-IF.C.7E

An exponential function is graphed on the grid.

• g(x) = 6(1/3)^x

• g(x) = 6(3)^x

• g(x) = 6 − (1/3)^x

• g(x) = 6 − (3)^x

Tags

CCSS.HSF.LE.A.2

Which function represents the same relationship?

• f(x) = 15(5/6)^x

• f(x) = 18(6/5)^x

• f(x) = 15(6/5)^x

• f(x) = 18(5/6)^x

Tags

CCSS.HSF.LE.A.2

• any real number

• any whole number greater than 0

• any whole number greater than 5

• any whole number greater than or equal to 5

Tags

CCSS.HSF-IF.C.7E

Given the following table of values, construct the function that represents the sequence.

• y = 3(4)^x

• y = 3x + 4

• y = sqrt(3)

• y = 4x + 3

Tags

CCSS.HSF.LE.A.2