please help me with this quiz

\fNext Page Page 2 of 15 Question 2 (1 point) The speed of an object is the magnitude of its velocity at time t. speed = v(t) |= [s'(t)|. O True O False Page 2 of 15 Next Page Submit Quiz 1 of 15 questions savedofall: Attempt Next Page Page 3 of 15 Question 3 (1 point) A projectile is launched with a velocity of 30 m / s at 40 to the ground. To two decimal places, the horizontal velocity is O 22. 98 m/s O 22. 98 km/h 2. 98 m/s 2. 98 km/h Page 3 of 15Next Page Pag Question 4 (1 point) In an optimization problem, you must determine the maximum or minimum value of a quantity. O True O False Page Next PageNext Page Page 5 of 15 Question 5 (1 point) If the velocity function u( t ) of an object is at its maximum, then the value of a ( t ), its acceleration, is zero. True False Next Page Page 5 of 15 Submit Quiz 4 of 15 questions savedNext Page Page 6 of 15 Question 6 (1 point) Negative acceleration, a(t ) 0, indicates that the velocity is decreasing. True O False Page 6 of 15 Next Page Submit Quiz 5 of 15 questions saveduestion 7 (1 point) A boat demonstrates a positive velocity but a negative acceleration, Which of the following plots illustrates its motion? Oa) Od Page 7 of 15 Submit QuizNext Page Page 8 of 15 Question 8 (1 point) A ball is thrown upwards then falls back down to the ground. If h(t) represents the height of the ball, which of the following best illustrates the initial conditions of this situation? O a) h'(t) 0 Ob) h'(t) > 0 and h"(t) 0 and h" (t) > 0 d) h'(t) 0 Ob) v(t) > 0 and a(t) > 0 O c) v(t) > 0 and a(t)