A speck of dust is 2.8 x 10-8 m wide. Which of the following is the best way to rewrite this quantity, using more appropriate units?
O A. 2.8 x 10-6 cm
B. 2.8 x 10-5 mm
O C. 2.8 x 10-11 km
O D. 2.8 x 10-8 m

Write the expression in simplified radical form. show all steps and work including any foil method work. (hint: use the conjugate. no decimal answers.) (9-2√3)/(12+√3)

Tim's phone service charges $23.06 plus an additional $0.22 for each text message sent per month. if tim's phone bill was $28.56, which equation could be used to find how many text messages, x, tim sent last month?

Haley buys 9 pounds of apples for $3. how many pounds of apples can she buy for $1?