14 coins. 140/10 = 14 :) Hope this helped!
10, 8, 6, 4,…
-2 -2 -2
a(n) = a₁ + d(n - 1)
a(n) = 10 - 2(n - 1)
a(n) = 10 - 2(n) + 2(1)
a(n) = 10 - 2n + 2
a(n) = -2n + 10 + 2
a(n) = -2n + 12
The product of .33 and 38 is 0.13 ( rounded to the nearest hundredth)