What is 30 + 30 ? hurry

If the wwight of a package is multiplied by 7/10 the result is 65.8 find the weight of the package

Which statements regarding efg are true? check all that apply.

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?