When  - (-87 mpg e 39kw hrs/100mi one) the  epas rated combined fuel economy how many operating mode are there?
Vehicle Operating mode EPA rated All-electric range EPA rated combined fuel economy Clean electric grid California (San Francisco) U.S. national average electric mix Dirty electric grid Rocky Mountains (Denver)
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Mitsubishi i-MiEV All-electric mi (km) 112 mpg-e (30kW-hrs/100mi) 100 g/mi (62 g/km) 200 g/mi (124 g/km) 290 g/mi (180 g/km)
Ford Focus Electric All-electric mi (km) 105 mpg-e (32kW-hrs/100mi) 110 g/mi (68 g/km) 210 g/mi (131 g/km) 310 g/mi (193 g/km)
BMW ActiveE All-electric mi (km) 102 mpg-e (33kW-hrs/100mi) 110 g/mi (68 g/km) 220 g/mi (137 g/km) 320 g/mi (199 g/km)
Nissan Leaf All-electric mi (km) 99 mpg-e (34kW-hrs/100mi) 120 g/mi (75 g/km) 230 g/mi (143 g/km) 330 g/mi (205 g/km)
Chevrolet Volt Electricity only ( charge-depleting ) mi (km) 94 mpg-e (36kW-hrs/100mi) 190 g/mi (118 g/km) (1) 260 g/mi (162 g/km) (1) 330 g/mi (205 g/km) (1)
Smart ED All-electric mi (km) 87 mpg-e (39kW-hrs/100mi) 130 g/mi (81 g/km) 260 g/mi (162 g/km) 380 g/mi (236 g/km)
Coda All-electric mi (km) 73 mpg-e (46kW-hrs/100mi) 160 g/mi (99 g/km) 300 g/mi (186 g/km) 440 g/mi (273 g/km)
table_24620684_2
SELECT COUNT Operating mode FROM table WHERE EPA rated combined fuel economy = 87 mpg-e (39kW-hrs/100mi)
87 mpg-e (39kW-hrs/100mi)