Hey there!
Here's your answer: the perimeter of the redone yard would be ~193 feet
Hope this helps!
Answer:
Not exactly sure but I think it should be 30 pieces
Step-by-step explanation:
$6!
10% is $3, you just move the decimal to the left one space, and that's 10%, so double is $6
The 25th percentile corresponds to z ≈ -0.67.
The 90th percentile corresponds to z ≈ 1.28.
So, you can write two equations in μ and σ as here:
.. μ -0.67σ = 10
.. μ +1.28σ = 20
The solution is
.. μ ≈ 13.45
.. σ ≈ 5.11