28. use the first equation in section IV for this problem. K=-Ug, G=6.67x10^-11 m^3 kg^-1 s^-2 , and M= 3.2x10^23 kg. find v in terms of r

The simple interest on a loan of $200 at 10 percent interest per year is $10 per year until the loan is paid off. $15 per year until the loan is paid off. $20 per year until the loan is paid off. $25 per year until the loan is paid off.

In an experiment, how can i change human errors? be specific.

Which component of the earth’s atmosphere is decreased due to photosynthesis?