Perform the conversion. Round to the nearest tenth when necessary.52 mi/hr to km/hr
A. 32.3 km/hr
B. 55.1 km/hr
C. 49.2 km/hr
D. 83.7 km/hr
Answer: D
Mathematics
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Perform all operations in correct order.72 - 2 × 4
A. 188 B. 100 C. 140 D. 41
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Simplify. Assume that variables can represent any real number.
A. 7t
B. 24
C. 7
D. 7t2
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Use the summation properties and rules to evaluate the series. The following rules may be needed: 
.
A. 195 B. 219 C. 40 D. 64
Mathematics
Solve the problem.A person's hair length varies proportionately with the number of weeks it has been growing. If Fred shaved his head bald and his hair was 0.24 inches long after 8 weeks, how long would it be after an additional 8 weeks? Round to the nearest hundredth of an inch.
A. 0.48 in. B. 5.33 in. C. 2.67 in. D. 0.24 in.
Mathematics