Answer:97 rods
Step-by-step explanation:
The number of steel rods for 95% confidence level


E=3

Substituting values


Thus 97 rods is tested
Answer:
f(7) = 22 or x =2
Step-by-step explanation:
- f(x) = 3x + 1
- f(7) = 3(7) + 1
- f(7) = 21 + 1
- f(7) = 22
<u>Or if the equation meant it like this:</u>
- f(x) = 3x + 1
- 7 = 3x + 1
- 6 = 3x
- 2 = x
Answer:
You might want to put that in a picture, because that makes very little sense.
By adding/ subtraction systems
2^5/2^2 = 2^(5-2)
= 2^3
= 8