An investor was afraid that he would become like King Lear in his retirement and beg hospitality from his children, so he purchased grain "tithes," or shares in farm output, for 700 pounds. The tithes paid him 73 pounds per year for 30 years. What interest rate did the he receive on this investment?

5%

Step-by-step explanation:

A = P(1+r)^n

A is the total amount the investment yields in 30 years.

Total amount = total interest + principal = (73×30) + 700 = 2,190 + 700 = 2,890 pounds

P is the principal,it is the amount that is invested. P = 700 pounds

n is the duration of the investment. n = 30 years

2,890 = 700(1 + r)^30

(1 + r)^30 = 2890/700

(1 + r)^30 = 4.13

1 + r = (4.13)^1/30

1 + r = 1.05

r = 1.05 - 1 = 0.05 = 5%

Interest rate (r) is 5%

there will be 35 boys in each team. : )

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this