Andy and elizabeth each rounded 2,639,456 to the nearest ten-thousand. andy got 2,640,000. elizabeth got 2,630,000. who is correct? explain the error that was made.

10% of 1,900,000. show me how you got the answer

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .

Mrs. blake's bill at a restaurant is $42.75. she wants to leave the waiter an 18% tip. how much will she pay in all, including the tip?