What numbers do we need to round to the nearest 100? 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200
0, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1,000
5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year. how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.

The angles below are supplementary. what is the value of x? a pair of supplementary angles is shown. one angle measures 7x + 33, and the other angle measures 70. 5.3 8.14 11 14.7

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?