Prove that: 16sin20.sin40.sin60.sin80=3

If 1 km = 0.621 miles, how many miles are in a centimeter

Acar travels at an average speed of 56 miles per hour. how long does it take to travel 196 miles

The function a represents the cost of manufacturing product a, in hundreds of dollars, and the function b represents the cost of manufacturing product b, in hundreds of dollars. a(t) = 5t + 2 b(t) = 7t - 2t +4 find the expression that describes the total cost of manufacturing both products, a(t) + b(t). a. 7t^2 - 7t + 2 b. 7t^2 + 3 +6 c. 7t^2 + 7t - 6 d. 7t^2 - 3t + 6