Directions: Read and understand the problems below. Write the letter of STRICTLY NO ERASURE. 1-5: Given 50 multiple-choice items in their final test in Mathematics, the scores of following: 23 38 28 46 22 20 18 34 36 35 44 21 18 43 21 26 37 29 13 36 1. Find the value of the lower quartile. A, 20 B, 21 C. 22 D. 23 2. How many students belong to the top 25% of the class? A 2 B. 3 C. 4 D. 5 3. Find the value of D3? A. 18 B. 20 C. 21 D, 22 4. How many students belong to P75? A. 13 B, 14 C. 15 D. 16 5. Find the value of Ds. A. 28 B, 29 c, 34 D. 36​

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)