hello I need help solving those questions in the next hour if possible thankyou so much in advance!

"a 8. A car accelerates at 1.75m/s2 along a straight road. It passes two marks that are 34.6m apart at times t=4.055 and t=5.055. What was the car's velocity at t=0? Submit Answer Tries 0/10 0 a Heather and Jerry are standing on a bridge 60.0m above a river. Heather throws a rock straight down with a speed of 23.3m/s. Jerry, at exactly the same instant of time, throws a rock straight up with the same speed. Ignore air resistance. How much time elapses between the first splash and the second splash? Submit Answer Tries 0/10 Both rocks hit the water with the same speed. What speed do they hit the water with? Submit Answer Tries 0/10 u a Two vectors A and B have precisely equal magnitudes. For the magnitude ofA + B to be 62 times greater than the magnitude ofA - B, what must be the angle between them? Odeg Submit Answer Incorrect. Tries 1/10 Previous Tries 0 a A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 7.50m/s at an angle of 21.5deg below the horizontal. It strikes the ground 3.205 later. How far horizontally from the base of the building does the ball strike the ground? Submit Answer Tries 0/10 Calculate the height from which the ball was thrown. Submit Answer Tries 0/10 How long does it take the ball to reach a point 11.5m below the level of launching? Submit Answer Tries 0/10 0 a Instructions for finding a buried treasure include the following: Go 73.0 paces at 236deg, turn to 136deg and walk 127 paces, then travel 111 paces at 169deg. The angles are measured counterclockwise from an axis pointing to the east, the +x direction. Determine the resultant displacement from the starting point. Enter the distance (without units) and the angle relative to the positive x-axis. Submit Answer Tries 0/10 Submit Answer Tries 0/10 0 a A child in danger of drowning in a river is being carried downstream by a current that has a speed of 2.70km/h. The child is 0.560km from shore and 0.820km upstream of a boat landing when a rescue boat sets out. If the boat proceeds at its maximum speed of 21.7km/h relative to the water, what heading relative to the shore should the captain take? Submit Answer Tries 0/10 What angle (in degrees) does the boat velocity make with the shore? Submit Answer Tries 0/10 How long does it take the boat to reach the child? Submit Answer Tries 0/10