The price of a skateboard is reduced by 25 per cent. the new price is then reduced by a further 20 per cent. the final sale price of the skateboard is $59.24 . find the original price of the skateboard and the price after the first reduction

The particle p starts from rest at point a at time t = 0 and changes its speed thereafter at a constant rate of 2.8g as it follows the horizontal path shown. determine the magnitude and direction of its total acceleration (a) just before point b, (b) just after point b, and (c) as it passes point c. state your directions relative to the x-axis shown (ccw positive) and choose the angle with the smallest magnitude.