The concept useful in finding the answer to this item is ratio and proportion, the ratio of the height of your friend with the shadow casted should be proportional to the height of the rock with the length of the shadow it cast. That is,
5.5 ft / 18 ft = x ft/ 209.5 ft
The value of x from the equation above is 64 ft.
Answer:

Step-by-step explanation:
If there are 9 marbles in total and the desired outcome is to pick a green marble then the probability is
=
which simplifies down to a third.
Answer:
B
Step-by-step explanation:
45-45-90 rt. triangle
For this case we have a function of the form:

Where,
A: initial amount
b: decrease rate
x: time in years
Substituting values we have:

For 2010 we have:
Answer:
an exponential decay function to model this situation is:
y = 1300 * (0.97) ^ x
The population in 2010 is:
y = 1083
Answer:
-4
Step-by-step explanation:
That's the answer above