B, because if you divide 7 by 9, you get 0.7 repeated, which if rounded is 0.78
Answer:
thats not easy
Step-by-step explanation:
Answer:
12
Step-by-step explanation:
Answer:
-11
Step-by-step explanation:
Hope this helps!
and if u ment 32-21 it’s 11
Answer:

Step-by-step explanation:
Height doubles at every 30 seconds, so let's call n how many times it happens, and the t the total time:
n = t/30
If the height doubles one time, it is multiplied by 2, if it doubles 2 times, it's multiplied by 2², for n times, it is multiplied by 2ⁿ, so for an initial height equal to 3:
