A baseball player hits a baseball, changing its momentum by 15 (kg • m) / s. The net force on the ball is 7,100 N. How long does the bat maintain contact with the ball?

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

The chart shows the costs and shipping times for materials that a company needs to build a new product. which describes the best trade-off if the company needs to start building their product within the next two years? they should order the domestic materials because it is always best to choose the fastest shipping time. they should order the imported materials because it is always best to choose the lowest cost for materials. since the shipping time is longer, they should order the domestic materials because the additional cost is worth it to get the materials in time. even though the shipping time is longer, they should order the imported materials because they are less expensive and should arrive in plenty of time to build the product.

Multiply 5.036×102m by 0.078×10−1, taking into account significant figures.