A music store marks up the instruments it sells by 30%. If the store bought a guitar for $45, what will be its store price? a
$58.50
b
$67.98
c
$8.50

Asensitive measuring device is calibrated so that errors in the measurements it provides are normally distributed with mean 0 and variance 2.00. find the probability that a given error will be between -3 and 3.