Natalia sawed five boards of equal links to make a school each was 9/10 of a meter long what is the total length of the board sh
1 answer:
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Answer:
The answer is "".
Step-by-step explanation:
Solve the L.H.S part:
After calculating the L.H.S part compare the value with R.H.S:
In equation (i) multiply by 3 and subtract by equation (iii):
put the value of c in equation (i):
In equation (ii) multiply by 3 then subtract by equation (iv):
put the value of d in equation (iv):
The final answer is "".
Answer:
Step-by-step explanation:
Given that in order to efficiently bid on a contract, a contractor wants to be 95% confident that his error is less than two hours in estimating the average time it takes to install tile flooring.
Std deviation =4.5 errors
95% confidence interval = Mean±1.96*std dev
Hence we have
Sample size should be 20.