Answer:
the ratio of red 2/10
easy I think it's not hard
there is tow red balls and 8 blue balls
For this case we have the following relationship:
Total cost = (Unit Cost) * (Number of meters)
Therefore, substituting values in the given equation we have:
Total cost = (10.69) * (0.70)
Total cost = $ 7,483
This means that Sid will spend $ 7,483 to do the work.
Answer:
Sid will spend about $ 7,483.
i thimk this might be the answer to question 3 (iii)
I'm sorry I don't know how to solve the first question
The 68-95-99.7 rule tells us 68% of the probability is between -1 standard deviation and +1 standard deviation from the mean. So we expect 75% corresponds to slightly more than 1 standard deviation.
Usually the unit normal tables don't report the area between -σ and σ but instead a cumulative probability, the area between -∞ and σ. 75% corresponds to 37.5% in each half so a cumulative probability of 50%+37.5%=87.5%. We look that up in the normal table and get σ=1.15.
So we expect 75% of normally distributed data to fall within μ-1.15σ and μ+1.15σ
That's 288.6 - 1.15(21.2) to 288.6 + 1.15(21.2)
Answer: 264.22 to 312.98
I think its 15+y or 15y im not surw
