Is 70 thousand written in standard form or expanded form explain

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

500 students went on a picnic trip 10 students chapter in each car how many cars were used for the picnic trip

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.