To pass science, a student must earn at least a grade of 70. How many students failed this science class?
Science Grades
Number of Students
50 - 59
60 - 69
80-89
90 - 100
70 - 79

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.

How can you tell when x and y are not directly proportional?

50 points~ ! i have to turn this in tomarrow