Answer:
The area of the circular cross section of the pipe is 
Step-by-step explanation:
we know that
The area of the circle (cross section of the pipe) is equal to

we have
----> the radius is half the diameter
substitute


<span>1.7a+0.3a=4/5
2a = 4/5
a = 4/5 * 1/2
a = 4/10
a = 2/5
answer
</span> a = 2/5
updated
Answer:
Since the ray bd is bisecting the angle abc, equate 3x + 4 to 7x - 20.
Step-by-step explanation:
3x + 4 = 7x - 20
x = 6
.. Therefore, angle abc = 3x + 4 + 7x - 20
= 18 + 4 + 42 - 20
= 44
Answer:
1
Step-by-step explanation:
10 is the population mean.
The SRS he takes, the simple random sample, is the 60 horses with colic. The population would be all of the horses seen at the clinic. Therefore the mean of the horses seen at the clinic would be the population mean.