6 positive integer divisors are perfect cubes. I figured out what could possibly go into 23, 328 then did all the perfect cubes til those numbers appeared. A positive integer divisor is any number that isn't negative or non rational that goes into a selected number.
Square root functions domain have to be set greater than or equal to zero, so we can set x+4 greater than or equal to zero.
[-4, + infinity)
Since she had $35.48 on her card.
Amount spent in buying coffee = $70 - $35.48 = $34.52
Cost of coffee = $8.63 per pound
No of pounds = Amount spent / cost per pound
= 34.52 / 8.63 Use your calculator.
= 4