The cost of a protein bar increased from $2.50 to $2.80. How much was the percent increase to the $2.80 rate?
Answer(s): D
First subtract the old cost from the new cost: $2.80 – $2.50 = $0.30. Then divide the difference by the old cost to find the percent difference: $0.30 ÷ $2.50 = 0.12 = 12%.
An aircraft flies over Boondock Air Force Base at 10:20 a.m. At 10:32 a.m., the plane passes over Sea Side Naval Air Station, 120 miles away. How fast is the aircraft traveling?
Answer(s): C
The aircraft travels 120 miles in 12 minutes, which is 1⁄5 of an hour. Therefore, in 5⁄5 (one) hour, it would travel 5 × 120, or 600 miles. The aircraft is traveling 600 miles per hour.
Last year, Margot grew 50 bushels of corn in her backyard. This year, the yield has increased 8%. How many bushels of corn did Margot grow this year?
Multiply 50 bushels by 8% to find the yield increase in bushels: 50 × 0.08 = 4. Add 4 bushels (the amount of the increase) to 50 bushels (the original yield) to determine that an 8% increase equals 54 bushels.
Junior has saved money in his piggybank over the winter. He wants to buy a $30 computer game.If he has 14 one-dollar bills, 16 half dollars, 12 quarters, 8 dimes, 25 nickels, and 10 pennies, how much more does he need to borrow from Dad to buy the game?
Answer(s): B
Convert the change to dollars or fractions of dollars and add: Subtract the total from $30.00 to determine how much money Junior has to borrow:$30.00 – $27.15 = $2.85.
Debbie receives a weekly salary of $80, plus a 5% commission on any sales. During the week, she has $800 in total sales.What’s the ratio of her commission to her salary?
Her commission for the week was $40 (0.05 × 800 = 40). The ratio of her commission to her salary is 40⁄80, which can be reduced to 1⁄2.
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