(C) 9
(D) 8
(B) 10
11
2. How many times does the digit 0 occur in two-digit numbers?

9 times.

Step-by-step explanation:

The two digit numbers are 10 - 99.

Zero appears 9 times in the group of numbers.

10, 20, 30, 40, 50, 60, 70, 80, 90.

Therefore, the correct option should be C.

Hope this helps.

step-by-step explanation:

hjkj

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11