Ch. 8 Review

100 pts each (-3.2)0 (2xy3)4(x2y)4

100 pts each -(3)-1 𝑥 12 𝑥 6

100 pts each (3)-2 𝑥 4 𝑥 9

100 pts each 8x-3y5 5 𝑥 −6 𝑦 3

100 pts each 5 8 5 12 22 x 2-8

100 pts each 𝑚 −2 𝑛 −4 𝑚 −12 𝑛 −8 8-2 x 90

100pts each 8-2 x 80 x 810 ( 2𝑥 3 )3

100pts each 2a-9 x 5a5 ( 3 5 )2

100pts each y3 x 3y2 x 5y -2a2 x 4b-4 x 4b8 x a-4

100pts each ( 𝑥 −2 𝑥 7 𝑥 −3 )-2 (r-3)5

200 pts ( −1 7 −3 −2 )3

Evaluate 2x3y-3 when x = -2 and y = 3. 200 PTS EACH Evaluate 2x3y-3 when x = -2 and y = 3. Evaluate 1 3 −3 𝑥 −2 𝑦 −2 when x = 3 and y = -2

300pts Write all in standard form 5 x 10-3 9 x 103 2.34 x 10-5

200pts Write in scientific notation 4,203,000,000,000 .00000000435

200pts simplify (8 x 102)(4 x 109) (3 x 104)-2 (0.2 x 10-4)(.7 x 10-4)

200pts Suppose the population at a school is 560 students and is growing at a rate of 5% each year. Write an equation to model the population growh. Predict the population after 10 years.

200pts Find the balance in the account $5000 principal earning 2% after 7 years. $2300 principal earning 10% after 3 years.

200pts A car costs $34,000 and decreases in value by 12% per year. How much will the car cost after 5 years?

Write using only one exponent. 27x3y3 100pts Write using only one exponent. 27x3y3

100pts Graph y = 3x

100pts Graph y = -3x

100pts Graph y = 3-x

Wrap up Questions / Comments Bonus: candy and 3pts extra credit Category: Write a ratio

Bonus From 1995 through 1999, the sales for a national furniture store increased by about the same percent each year. The sales, s, in millions of dollars for year, t, can be modeled by s = 476(1.13)t, where t = 0 represents since 1995. Find the ratio of 1996 sales to 1999 sales.