Step-by-step explanation:
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Step-by-step explanation:
Radius = 4 ft
Side of the square = 8 ft
Area of circle = πr² ≈ 3 × 4² = 48 ft²
Square area = a² = 8² = 64 ft²
area of composite shape = Square area - Area if circle = 64 - 48 = 16 ft²
<span>4 ⋅ 6 + 5 ⋅ 7 + 6 ⋅ 8 + ... + 4n( 4n + 2) = 4(4n+1)(8n+7)/6
is false because it isn't even true when n=1.
4 ⋅ 6 = 4(4*1+1)(8*1+7)/6
24 = 4(5)(15)/6
24 = 50
Also 4n(4n+2) is not even the correct formula
for the nth term. The correct nth term formula
of 4 ⋅ 6 + 5 ⋅ 7 + 6 ⋅ 8 + ...
is (n+3)(n+5). So it's wrong all the way around.</span>
Culebra Cut = 1 'time'
rest of the canal = 9 'times'
Total length of the canal = 10 'times'
10 'times' = 50 miles
each 'time' = 5 miles.
Culebra Cut = 1 'time' = 5 miles
rest of the canal = 9 'times' = 45 miles
