Grayson and Cross each bought a pool membership. Their average cost per day is inversely proportional to the number of days that they go to the pool. Grayson went to the pool 25 days for an average cost per day of $5.60. Cross went to the pool 35 days. What was his average cost per day? Answer Not Here $2.40 O $140 O $1.40 $4.00​

1.   an exact solution requires a radical solution - no decimal approximation.2. (a)4x^3 = 756x^3 = 756/4 = 189x =   cube root of 189 =   5.74   to nearest hundredth answer(b)   189 = 3*3*3*7   so we can write the cube root of 189 as 3∛7 answerchecking (a) 4*(5.74^3 =   756.48   which is very close(b)   4* ((3∛3)^3   = 4*189   = 756   - spot on! 3. i would use solution b because the original question asked for an exact solution.