Since Anna is either grouping them as single rock or as group of 10, we need to find the maximum number of groups of 10 as follows: 38/10 = 3.8
This means that Anna can make maximum 3 groups of 10 rocks.
Based on this, the different ways to group the rocks are as follows: - 3 groups of 10 and 8 (which are calculated as: 38-30) single rocks - 2 groups of 10 and 18 (which are calculated as: 38-20) single rocks - 1 group of 10 and 28 (which are calculated as: 38-10) single rocks - 0 group of 10 and 38 (which are calculated as: 38-0) single rocks
The nature of the roots of a quadratic equation may be readily determined through the use of its discriminant, D = sqrt (b² - 4ac) We can tell if the quadratic equation does not have a real root it the radicand is negative. Therefore, the answer is letter A.
