C(x) = 400 + 20x - 0.2x²

c(30) = 400 + 20(30) - 0.2(30)²

= 400 + 600 - 0.2(900)
= 1000 - 180
= 820

It costs $820 when 30 radios are produced.

Marginal cost is how much it would cost to make one MORE of the same product so now we find how much it costs to produce 31 radios and compare the two.

c(31) = 400 + 20(31) - 0.2(31)²

= 400 + 620 - 0.2(961)
= 1020 - 192.2
= 827.8 or ≈828.

Now we find the difference which means we subtract the two.

828 - 820 = 8.

Your marginal cost is $8.

To compare we can also do 29 radios.

c(29) = 400 + 20(29) - 0.2(29)² = 811.8 or ≈812

820 - 812 = 8.

7 0

3 years ago

The graph shows the cost to rent a surfboard for different amounts of time. Cost to Rent a Surfboard Cast (dollars) 1 7 23 4 5 6

Romashka-Z-Leto [24]

Answer:

Step-by-step explanation:

Because it is asking for the amount of times and the dots land in 1,2,3,4,5,6 hope this helps :D

3 0

2 years ago