28 + 11 = 7 + 12 =
15 + 2 =
22 + 1 =
45 + 2 =
18 + 2 =
7 + 11 =
10 + 11 =
12 + 10 =
11 + 2 =
15 + 10 =
16 + 12 =
2 + 24 =
62 + 10 =
98 + 2 =
12 + 3 =
18 + 12 =
2 + 17 =
14 + 11 =
2 + 40 =
Vertical Addition 1 + 1 = 2

Ball bearings are made by letting spherical drops of molten metal fall inside a talll tower-called a shot tower- and solidify as they fall. a-if a bearing needs 4.0 s to solidify enough for impact, how high must the tower be? b- what is the bearing's impact velocity?