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%

12 feet because you take 10 feet and multiply by 12 to make it inches then divide that by 15 to find the scale factor and it is 8 so you take 18 and multiple that by 8. You get 144. You then divide that by 12 to convert it back to feet and you get 12 feet.