(2/7)^0= 1
(9)^0=1
i think that's what your asking if not let me know
Answer:

Step-by-step explanation:
First, multiply the two denominators together to get the shared denominator, which will allow you to actually subtract the two numbers. 4 × 8 = 32, so the shared denominator will be 32.
Then, cross-multiply. 11 × 8 = 88, so
becomes
. 3 × 4 = 12, so
becomes
.
Now, you can subtract. 
Finally, simplify.
. The final difference is
.
Answer:
sin90 =1
cos 90 = 0
Step-by-step explanation:
θ = 90 degrees
Answer: For your specific problem, h = 300 / (4 + 5 + 6) = 300 / 15 = 20
Step-by-step explanation: