A, B, D are functions.
(First, second, and fourth response)
You can see which is function since for everyone input only has one value. You can also use the vertical line test.
Answer:
The diameter of pool a is 10.37 (34 × 0.305)
Pool B is greater
The circumference of pool B is greater
The area of pool B is 65.7221183130984ft
The area of pool a is
32.5783158177261ft
65.7221183130984 - 32.5783158177261=
Pool Bs area is 33.143802ft² bigger
Producing 73.8 units gives the lowest possible average cost.
The average cost (AC) is the ratio of the total cost to the number of units produced. It is given by:
AC = C(x) / x
AC = (0.2x³ – 24x² + 1514x +30064) / x
AC = 0.2x² - 24x + 1514 + 30064/x
The lowest possible average cost is at AC' = 0. Hence differentiating the average cost, gives:
AC' = 0.4x - 24 - 30064/x²
0.4x - 24 - 30064/x² = 0
0.4x³ - 24x² - 30064 = 0
Solving the cubic polynomial gives:
x = 73.8 units
Therefore the lowest possible average cost is when 73.8 units are produced.
Find out more at: brainly.com/question/20346871
71% water
29% land
71:29= 2,448=> the amount of earth surface that is covered with water is ~2,5 times bigger than the amount of earth surface that is covered with land
