The time taken to fill a tank was 2 hours 43 minutes. Write this time to the nearest 5 minutes. The attendance at a show was 2591 people. How many people, to the nearest 100, were at the show? (d) The mean distance of the Moon from the Earth is approximately 384 403 km. Write this distance in the form × 10k where 1 < 10 and .  a ≤ a k (Total 4 marks) The following diagram shows a rectangle with sides of length 9.5 × 102 m and 1.6 × 103 m. diagram not to scale (a) Write down the area of the rectangle in the form × 10k, where 1 < 10, . a a k ≤ (3) of the area of the rectangle is 1 600 000 m2. Helen’s estimate (b) Find the percentage error in estimate. Helen’s (3) (Total 6 marks) (a) Given = 2.6 × 104 and = 5.0 × 10–8, calculate the value of = Give your x y w x × y. answer in the form × 10k where 1 < 10 and . a a ≤ (b) Which two of the following statements about the nature of and above are x, y w incorrect?
The time taken to fill a tank was 2 hours 43 minutes. Write this time to the nearest 5 minutes. The attendance at a show was 2591 people. How many people, to the nearest 100, were at the show? (d) The mean distance of the Moon from the Earth is approximately 384 403 km. Write this distance in the form a × 10k where 1 ≤ a < 10 and k  . (Total 4 marks) The following diagram shows a rectangle with sides of length 9.5 × 102 m and 1.6 × 103 m. diagram not to scale (a) Write down the area of the rectangle in the form a × 10k, where 1 ≤ a < 10, k . (3) Helen’s estimate of the area of the rectangle is 1 600 000 m2. (b) Find the percentage error in Helen’s estimate. (3) (Total 6 marks) (a) Given x = 2.6 × 104 and y = 5.0 × 10–8, calculate the value of w = x × y. Give your answer in the form a × 10k where 1 ≤ a < 10 and . (b) Which two of the following statements about the nature of x, y and w above are incorrect?
IB-Studies-Test-One-2016-Number-Coordinate-Geometry.docx