A company makes 140 bags. 28 of the bags have buttons but no zips. 47 of the bags have zips but no buttons. 27 of the bags have neither zips nor buttons. How many bags have zips on them?

Rob filled 5 fewer plastic boxes with football cards than basketball cards. he filled 11 boxes with basketball cards.

The perimeter of a quarter circle is 14.28 miles. what is the quarter circle's radius?

Awavelength of 610 nm was found to be the most intense wavelength emitted by copper. answer the following questions about this wavelength of light. a) what is this wavelength in cm? b) what is the frequency that corresponds to this wavelength? c) what is the energy of light of this wavelength? d) what is the wavenumber corresponding to this wavelength?