A home stereo depreciates by 20% each year.What’s the value of a stereo, purchased new for $1,200, after two years?
Answer(s): A
The stereo depreciates $240 the first year (0.2 × 1200 = 240). Therefore, the value of the stereo after the first year is $1200 – $240 = $960. The second year the stereo would depreciate by $192 (0.2 × 960). The value of the stereo after the second year is $960 – $192 = $768.
Janet’s old pickup truck can only reach a speed of 45 miles per hour.If she drives at top speed, how long will it take her to reach a city 135 miles away?
Divide the distance (135 miles) by the speed (45 miles per hour) to determine that Janet will take 3 hours to reach the city.
A blouse normally costs $18.50.How much money is saved if the blouse is purchased at a 20% discount?
Answer(s): D
Multiply the price of the blouse by the amount of the discount: $18.50 × 0.20 = $3.70.
A clerk’s weekly salary of $320 is increased to $360. The percent increase is .
Answer(s): C
Subtract the original salary from the new salary to get the difference in salary: $360 – $320 = $40. Then divide the difference in salary ($40) by the original salary ($320) to determine the percent increase: 40 ÷ 320 = 0.125 = 12.5%.
Two go-carts are racing on a circular track with a perimeter of 360 feet. Camera One is following Go-Cart One, and Camera Two is following Go-Cart Two.If the angle between the two cameras is 40 degrees, how far apart are the two go-carts?
Answer(s): B
A circle is 360 degrees, so 40 degrees is 1⁄9 of a circle (360 ÷ 40 = 9). To get the answer of 40 feet, multiply the perimeter of the track 1⁄9 (360 × 1⁄9 = 40).
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Delayed the exam until December 29th.
A and D are True
good one with explanation
This is one of the most useful study guides I have ever used.
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