A poll was taken in middle school to determine the amount of the time spend on homework. 46% of the students surveyed were in 7th grade and 54% were in 8th grade. the students were asked, "do you typically spend more that 1 hour on homework each night?" 60% of the 7th graders answered "yes", whereas 70% of the 80% graders answered "yes". Make a two-way table:

What values of c and d make the equation true?

With these: 18/36 = 1/? missing number change 1 5/8 to improper fraction. change 19/5 to a mixed number.

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.