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Key Quiz 5.4
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1
Mila is saving for university. She has $9000, of which some is in a savings account earning 3.25% per year and the rest is in a GIC earning 5% a year. If she earned $324 in interest last year in total, how much was invested in her GIC?
A)$1800
B)$7200
C)$16,529.10
D)$25,529.10
2
Winston drove 500 km in 5½ h. Part of the way he drove at 120 km/h; the rest of the way he drove at 90 km/h. How far did he drive at each speed?
A)480 km @ 120 km/h and 20 km @ 90 km/h
B)10 minutes @ 120 km/h and 5 h 20 minutes @ 90 km/h
C)20 km @ 120 km/h and 480 @ 90 km/h
D)200 km @ 120 km/h and 300 km @ 90 km/h
3
It took Maya 1.5 h to kayak upstream against the current and 40 minutes to return downstream with the current. If Maya can kayak at a constant speed of 2.6 km/h, what was the speed of the current?
A)Cannot be solved with the information given.
B)2.4 km/h
C)1 km/h
D)Approximately 0.42 km/h
4
Harvey is ten years older than Vince. Five years ago, he was three times as old as Vince was. How old is Harvey now?
A)5 years old
B)10 years old
C)15 years old
D)20 years old
5
The Joker leaves the scene of the crime at 10:00 pm, speeding away at 75 km/h in his Jokermobile. Fifteen minutes later, Batman gets to the crime scene and immediately takes off after Joker at 120 km/h. At what time will Batman overtake the Joker?
A)10:30
B)10:35
C)10:40
D)10:55





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