Question

1. (a) In a lab experiment, some volunteers are given dose of antibiotics and its concentration in their blood is measured (in suitable units) at one hour intervals. Consider the data below: Time (hours) 0 1 2 3 4 5 6 Concentration 2.4 4.3 5.0 6.9 9.1 11.4 13.5​ (i) It is believed that a linear relationship exists between these variables. Estimate the line of best fit in this scenario. (5) (ii) What will be the concentration post 3.5 hours? Also find out how long will it take for concentration to reach 8 units?

Answer 1

Answer:

Ammonium nitrate can be shipped and stored and mixed with fuel oil when needed. Ammonium nitrate fuel oil (ANFO) is made of about 94% ammonium nitrate and 6% fuel oil. ANFO is widely used as an explosive in mining, quarrying, and tunneling construction or wherever dry conditions exist.