Sofia opens a new savings Account with a 2.25% non-compounding simple interest rate. She deposit $3500 and earned $3696.88 total by the time she checks into the account again. how long was the money left untouched in the savings account ?

Fredrick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.

Rewrite the following quadratic functions in intercept or factored form. show your work. f(t) = 20t^2 + 14t - 12