10 16. There are 36 tables set up for the graduation reception. Each table is
8 feet long. The tables will be covered with paper tablecloths that extend
an extra 3 inches over each end (so they can be taped underneath). What
is the total length of paper needed to cover all the tables?

We have that the total length of paper needed to cover all the tables is

From the question we are told that:

Number of tables

Length of table

Extension

Generally, the equation for the Total length  tables is mathematically given by

Therefore with an extension of 0.25ft at both end we have the Total length of  tablecloths to be

In conclusion

The total length of paper needed to cover all the tables is

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since the airplane is moving with constant speed then the distance travelled can be calculated by x=u*t

in km/h would be:

x=640*3.5=2.240 km

in m/s would be:

u=640 km/h= 640.000 m/h =640.000/ 3600 m/s =177.8 m/s

t= 3.5 h= 3.5 * 3600 s=12.600 s

then x=u*t= 177.8*12.600= 2.240.280 m