How many grams of 15% tin solder must be added to 200 g of 25% tin solder to make a final solder which is 20% tin?

Suppose a pendulum is l meters long. the time,t,in seconds that it tales to swing back and forth once is given by t=2.01

The estimated number of people to attend the last bengals game of the season was 2000. the actual number of fans attending was 1200. by what percent did the estimate differ from the actual?

Math each whole number with a rational,exponential expression