Question 1
For the total-cost function
C(x) = 0.01x
2 + 0.8x + 50,
find ΔC and C'(x) when x = 50 and Δx = 1.
◦ ΔC = $1.00; C'(50) = $1.00
◦ ΔC = $1.81; C'(50) = $1.30
◦ ΔC = $1.81; C'(50) = $1.80
◦ ΔC = $1.81; C'(50) = $1.00
Question 2
For the total-cost function
C(x) = 0.01x
2 + 2.2x + 80,
find ΔC and C'(x) when x = 100 and Δx = 1.
◦ ΔC = $4.21; C'(100) = $2.22
◦ ΔC = $4.20; C'(100) = $4.20
◦ ΔC = $4.21; C'(100) = $3.20
◦ ΔC = $4.21; C'(100) = $4.20