The freezing point of water is 0°C. Scientist use positive numbers to show temperature is above the freezing point of water and negative numbers to show temperatures are below the freezing point of water. Sarah keeps her bacteria samples at 4°C. what does 4°C mean in this situation? PLEASE HEL

3-12. write each answer with a reasonable number of figures. find the absolute uncertainty and percent relative uncertainty for each answer. (a) [12.41 (±0.09) + 4.16 (±0.01)] x 7.068 2 (±0.000 4) =? (b) [3.26 (±0.10) x 8.47 (±0.05)] - 0.18 (±0.06) =? (c) 6.843 (±0.008) x 104 + [2.09 (±0.04)- 1.63 (±0.01)] =?

Which of the following tables represents exponential functions?

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?