Exam 2: Review and Applications of Algebra

Perform the operation indicated and collect like terms:

Simplify:

Rearrange formula (4-1) to isolate d on the left side.

Simplify, collect like terms and maintain 5-figure accuracy:

Solve the following equation accurate to the cent:

Use formula (5-3) to obtain X if NI = -$542.50, CM = $13.50, and FC = $18,970.

Rearrange formula (4-2) to isolate d1 on the left side.

Simplify:

Rearrange formula (5-3) to isolate CM on the left side.

Perform the operation indicated and collect like terms:

In the second quarter (Q2) of 2009, Apple Computer sold 5.21 million iPhones, which represented a 626% increase over the number sold in Q2 of 2008. Rounded to the nearest 10,000, how many iPhones did Apple sell in the second quarter of 2008?

Perform the operation indicated and collect like terms:

Evaluate the following expression for the given value of the variable: 3d² - 4d + 15 for d = 2.5

Evaluate to six-figure accuracy:

Rearrange the formula FV = PV(1 + i)ⁿ to isolate PV on the left side.

After a 5.25% raise, Johnny earned $19.28 per hour. What was his hourly rate before the raise?

Simplify the following:

Evaluate to six-figure accuracy:

Yellowknife Mining sold 34,300 oz of gold in 1992 at an average price of $320 per ounce. Production was down to 23,750 oz in 1993 because of a strike of the miners, but the average price obtained was $360 per ounce. What was the percent change from 1992 to 1993 in: a) The amount of gold produced? b) The average selling price per ounce? c) The revenue from the sale of gold?