Sally has 6 boxes of colored pencils. only 3 of the boxes contain 12 colored pencil each. the remaining boxes each contain 20 colored pencils. she packs the colored pencils into 8 packets. how many pencils are there in each packet?

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.

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?