The revenue for a manufacturer is​ R(x) thousand​ dollars, where x is the number of units of goods produced​ (and sold) and R and Upper R prime are the functions given in the graphs on the right.
0
10
20
30
40
50
0
10
20
30
40
50
60
70
80
90
100
110
x
y
y equals Upper R left parenthesis x right parenthesis



A coordinate system has a horizontal x-axis labeled from 0 to 50 in increments of 2.5 and a vertical y-axis labeled from 0 to 110 in increments of 10. From left to right, a curve titled y equals Upper R left parenthesis x right parenthesis rises at a decreasing rate passing through the point (10, 35.3) and (20, 66) until it reaches the point (40, 96), and then falls at an increasing rate. All coordinates are approximate.
10
20
30
40
50
-3.6
-2.4
-1.2
0
1.2
2.4
3.6
x
y
y equals Upper R prime left parenthesis x right parenthesis



A coordinate system has a horizontal x-axis labeled from 0 to 50 in increments of 2.5 and a vertical y-axis labeled from negative 4 to 4 in increments of 0.4. From left to right, a curve titled y equals Upper R prime left parenthesis x right parenthesis falls at an increasing rate passing through (10, 3.4), (32.7, 1.2), and (40, 0). All coordinates are approximate.
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Part 1
​(a) What is the revenue from producing 20 units of​ goods?
The revenue from producing 20 units of goods is approximately ​$
  
enter your response here.
​(Type an integer or a​ decimal.)