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:

Hi there I know the answer but it was confusing so it has to be D or B
Answer:
900 miles
Step-by-step explanation:
Well, 200 miles is 1 inch. 100 miles is 1/2 an inch.
6/11=x/33 is not a proportion because they aren't equal to each other.
Answer:
a.) -18 x 10^6
Step-by-step explanation:
multiply 9 x-2
add exponents 9 and -3