Help please

Which is the standard form for this number? (4 x 1 100 ) + (8 x 1 1,000 ) + ( 3 x 1 100,000 ) ? a) 0.004803 b) 0.04803 c) 0.0483 d) 0.483

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Jasmine wants to eat at 8: 00pm her meal takes 65mins to cook what time does she need to put the meal in the oven