Answer:
Mean = ∑x + standard deviation = 429.21
Step-by-step explanation:
Mean lifespan = 71.45 years
Standard deviation = 12.35 years
Standard deviation= ∂ = x-µ / N
∂ = standard deviation
µ= mean
x = size of year
By using formula of standard deviation:
= 70 – 71.45 / 12.53
Approximately equal to 64.21
Mean = ∑x + standard deviation
= 365 + 64.21
= 429.21
Answer:
f(-2) =8
Step-by-step explanation:
f(x) = 3x^2+x-2
Let x = -2
f(-2) = 3 * (-2)^2 + (-2) -2
= 3(4) -2 -2
=12 -2-2
=10 -2
=8
A square has all 4 sides equal, so divide the amount of fence available by 4 to get the length of one side of the square
600/4 = 150
Now since the creek is being used for one side, add one side of the square to the other side to get a rectagle 150 by 300 feet.
Area = 150 x 300 = 45,000 square feet.
Abby has 7 more grapes because 16-9=7
