[2] Answer (a) Solve the + 5 < 21. (b) (i) inequality −3 ≤ 4x (ii) Hence write down the negative integer values of which satisfy the inequality. x [2] Answer (b) (i) [1] (ii) 3 (a) The star called Alpha Centauri is 41 305 Tera meters from Earth. Express the distance in metres written in standard form. m [1] Answer (a) (b) A space ship travels at a speed of 2.998 × 107 m/s. How long would it take to reach Alpha Centauri? Give your answer in days expressed in standard form.
Answer (a) [2] (b) (i) Solve the inequality −3 ≤ 4x + 5 < 21. (ii) Hence write down the negative integer values of x which satisfy the inequality. Answer (b) (i) [2] (ii) [1] 3 (a) The star called Alpha Centauri is 41 305 Tera meters from Earth. Express the distance in metres written in standard form. Answer (a) m [1] (b) A space ship travels at a speed of 2.998 × 107 m/s. How long would it take to reach Alpha Centauri? Give your answer in days expressed in standard form.
4NA_EM_P1_Prelim_2012.docx