Answer:

Step-by-step explanation:
we know that
In the right triangle ABC

Solve for AC

substitute the values

Answer:
Part a) 
Part b) 
Step-by-step explanation:
we know that
A reciprocal of a rational number
is obtained by changing the numerator and denominator, so the numerator becomes the denominator and the denominator becomes the numerator obtaining 
Part a) we have
200
we know that
the given number can be expressed as 
so
changing the numerator and denominator
The reciprocal is equal to 
Part b) we have
450
we know that
the given number can be expressed as 
so
changing the numerator and denominator
The reciprocal is equal to 
Use 8,888, then circle the 8 thousandth one (the first one on the left) then underline the 8 at the end (on the right)
Answer:
Because a prism travels at the speed of light . :)