First one is C,
Second is A
Third is C pretty sure
Fourth is D
I think the answer is 78 because more usually mean addition so 57+21=78
Answer: 90%
Step-by-step explanation:
54/60=0.9 0.9*100= 90
Answer:
The height of the cone is 
Step-by-step explanation:
we know that
The volume of a cone is equal to
In this problem we have
----> the radius is half the diameter
assume 
substitute the values and solve for h
Answer:
No, it is not prime.
Step-by-step explanation:
67^2 = 4489
A number cannot be prime if it is divisible by a number besides 1 and itself. 4489 is divisible by 67; no perfect square can be prime.
