If a playground is 30 3/4 feet by 20 1/2 feet in dimension, what is the perimeter of the playground?
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We are given
arithmetic sequence: u(1)= 124, u(2)= 117, u(3)= 110, u(4)=103
so, first term is 124
u(1)= 124
now, we can find common difference
now, we can find kth term
now, we can plug values
and we get
u(k) must be negative
so,
now, we can solve for k
so, it's closest integer value is
..............Answer
You would use 6 gallons of water to water 45 plants
4=30
=
of 4 gallons = 6 gallons
4=30