Area of a semicircle =

r² / 2
r= 5/2 = 2.5
So: A= 3.14 x 2.5² / 2 A = 9.8125 so rounding to the nearest hundredth is A=9.81
Answer:
a= (π/4) + (kπ/2)
Step-by-step explanation:
I have attached the explanation above. hopefully this will help
I think it’s the second one
Super easy just add 2 in front of Na H CO3(s). Your formula will be balanced.
Answer:
X +y=90 ( being complementary angles)