7,8,10,11,12

7. Which of the following C++ expressions is a translation of A. pow((pow(b, 2)-4 . a "c), 0.5) (B) pow((pow(b, 2)-4 * a * c), l/2) C. pow((pow(b, 2)-4 * a "c), 2/4) D. All: A, B, and C 8. Which of the following statements is NOT correct? A. The remainder (%) operator can be used with double variables. B. These logical operators (&&.ID have the same precedence. C. 5/4yields,and 5 % 4 yields 1. D. (a b ll a !. c) is the same as ((a-b) II (a 13c). 9. Which of the following statements is NOT correcet? A. It is allowed to declare a variable and initialize it in one statement. B. Once a variable is declared and initialized, you can change its value later on. C. The variable declaration tells the compiler to allocate appropriate memory ace for the variable based on its data type. It is allowed to declare two variables with the same name but with different data type. 10. Given int a, b, ci, which of the following assignment statements is NOT valid? A) a b 1 D. c., 2 % 5; 11. Which of the following statements can generate a random integer x, such that 50 Sx s99 2 rand() % 50 +50 rand() % 49 +50 C, rand() % 50 D. rand() % 99 A. 12. Given a string str, the index range of str is: A. between 0 and str.size0 B between 1 and str.size0 C. between 0 and (str.size)-1) D. between 1 and (str.size0-1)