Let a * b = 3a + 2b for a, b e Z. Verify that * is a
commutative binary operation on Z.
[2]

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Question 14 (1 point) larry deposits $15 a week into a savings account. his balance in his savings account grows by a constant percent rate.

Asoftball team played ten games, scoring 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10 runs. they lost by one run in exactly five games. in each of their other games, they scored twice as many runs as their opponent. how many total runs did their opponents score?