Question

Sarah biker around a lake 2 times in 1/2 hour what was her rate in number of times around the lake per hour?

Answer 1

2 times/ 1/2 hours = x times / 1 hours

using cross products

2 * 1 = 1/2 * x

multiply each side by 2

2*2*1 = 2* 1/2 * x

4 =x

she can bike 4 times around the lake in 1 hour