Average yearly inflation. if an item costs c at one time and d n years later, and cxn = d, then we call x the average annual inflation factor (for example, x = 1.04 refers to an inflation rate of 4%). at a 6% average annual inflation factor, it will take 12 years for the house to double. if 6% is replaced by r%, bankers use 72/r to estimate the number of years. this is called the rule of 72. graph this estimate and the actual answer over the interval 1 < = r < = 12. comment on the accuracy of the rule of 72.

As part of an annual fundraiser to raise money for diabetes research, diane joined a bikeathon. the track she biked on was 1,920 yards long. diane biked 38.5 laps. her sponsors agreed to donate an amount of money for each mile she biked. how many miles did she bike? first fill in the blanks on the left side using the ratios shown. then write your answer. given ratios: 5280ft / 1 mi , 1 mi /5280 ft , 1,920 yards / 1 lap , 1 lap / 1,920 yards , 3 ft / 1 yard , 1 yard / 3 ft. blanks: 38.5 laps / 1 yard x (blank) x (blank) x (blank) = (blank) miles i'm really confused on how to do this, and the explanations aren't exactly . if you could walk me through how to do this, it would be greatly appreciated.

Which statement justifies why angle ebc measures 90?

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap