What is the volume of a sphere with a radius of 6.6 cm, rounded to the nearest tenth of a cubic centimeter?

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?