Simplify the expansion (3×10³)(2×10²)+(1×10¹)+(3×10?)
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B) 3213
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At one high school, students can run the 100-yard dash in an average of 15.2 seconds with a standard deviation of 0.9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are:Less than 17 seconds
A. 98% B. 97.5% C. 84% D. 2.5%
Simplify.3 ? 10 + 11 ? 7
A. 287 B. 261 C. 441 D. 107
Solve the problem.The index of refraction for air, Ia, is 1.0003. The index of refraction for water, Iw, is 1.3. If 
and 
find W to the nearest tenth.
A. 21.7° B. 20.7° C. 22.7° D. 23.7°
Round to the indicated place.Chuck Yeager, who made the first supersonic flight, flew a North American Aircraft X-15 rocket plane to an altitude of 314,950 feet. Round to the nearest thousand feet.
A. 310,000 feet B. 315,000 feet C. 314,000 feet D. 314,900 feet