Atree standing vertically on level ground casts a 140 foot long shadow. the angle of elevation from the end of the shadow to the top of the tree is 24.7°. find the height of the tree to the nearest foot.,

Let the height of the tree be h foot. Trigonometric ratio for tangent = Opposite side / adjacent side(1) Since the tree is standing vertically on a level ground, the three points, [ Top of the tree, the point where the tree touches the ground and the point where the shadow ends] form a right angled triangle. Applying (1) for the above three points, tan(24.7)=(height of the tree)/(length of shadow) Hence, height of the tree = tan(24.7)*(length of the shadow) = (0.46)*140 = 65 foot (Rounding off to the nearest foot)

On monday,mrs.wise bought 3 lbs of apples at $4per lb= 4*3=$12on tuesday ,20%off and she buy 5 lbs of apples = $4-20%=3.20*5lb=$16example: other wise when she buy 5lbs on monday she have to spend 4*5=20