1.Two measurements are given. Find the absolute difference and then find the relative difference as a percentage. Assume that the first quantity is the compared value and the second quantity is the reference value. Round answers to the nearest tenth if necessary.

Last year the total revenue for Clearline phone company was $13.6 million while the revenue for its competitor, the Speakmore was $8.6 million.

a. Absolute difference: $5 million; Relative difference: 5.8%

b. Absolute difference: $5 million; Relative difference: 36.8%

c. Absolute difference: $-5 million; Relative difference: -36.8%

d. Absolute difference: $5 million; Relative difference: 58.1%

2.Measurements are made at two different times. Find the absolute change and then find the percentage change. Round answers to the nearest tenth if necessary.

The value of Anna's house increased from $250,000 when she bought it 20 years ago to $1.31 million today.

a. Absolute change: $1,060,000 Percentage change: 424%

b. Absolute change: $-1,060,000 Percentage change: -424%

c. Absolute change: $1,060,000 Percentage change: 42.4%

d. Absolute change: $1,060,000 Percentage change: 80.9%

3.Use the compound interest formula for compounding more than once a year to determine the accumulated balance after the stated period.

$8430 deposit at an APR of 4% with semiannual compounding for 8 years

a.$11,572.58

b.$11,537.04

c.$11,127.60

d.$9,877.09

4.Evaluate the validity of the chain of conditionals.

Premise: If I take a shower, I use soap.

Premise: If I use soap, my skin becomes dry.

Conclusion: If I take a shower, my skin becomes dry.

a.Valid

b.Invalid