Multiply and write the result in standard form.(2 + 5i)(9 + 3i)
A. 3 + 51i
B. 3 - 51i
C. 15i2 + 51i + 18
D. 33 + 39i
Answer: A
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Use unit ratios or conversion factors to change to the units indicated. Round to the nearest tenth, if necessary.199 g to ounces
A. 5,641.7 oz B. 7.0 oz C. 89.6 oz D. 69.7 oz
Factor out the greatest common factor.48m9 - 120m6 - 48m3
A. 24m3 (2m6 - 5m3 - 2) B. 24(2m9 - 5m6 - 2m3) C. m3(48m6 - 120m3 - 48) D. No common factor (except 1)
Solve the problem.In a school survey, students showed these preferences for instructional materials. Answer the question. 
About how many students would you expect to prefer computers in a school of 350 students?
A. About 70 students B. About 126 students C. About 63 students D. About 36 students
Write expanded notation.6080
A. 6 thousands + 0 hundreds + 8 tens + 0 ones B. 608 thousands C. 6 ten thousands + 8 thousands + 0 hundreds + 0 tens + 0 ones D. 6 hundreds + 0 tens + 8 ones