<span>The tortoise is runing one mile per hour the entire race.
The hare is runing 3/4 only the first half.
If we multiply by 2 totis =2 miles and hare =1.50 the hare need to run 1/2 or .50 faster to beat the tortis.</span>
The answer is C.
Here's why, nPr = n!/(n-r)!. Plug in 7 for n and 3 for r. And you get 7!/(7-3)!.
Thus, 7!/4! = (7*6*5*4*3*2*1)/(4*3*2*1), which simplifies to 7*6*5 = 210
The answer is x=5. I've included the work in the picture attached.
Answer:

Step-by-step explanation:
The scale factor (C) is the ratio of corresponding sides of the two pyramids.
The ratio of the areas is the square of the scale factor.

The scale factor is
.