The daily energy/calorie needs for this individual is 2164 kcal/day. In theory, she would gain 1.6 lbs, in 8 weeks. Her RDA for protein is 70 g/day. So, the correct options are (a) 2164 kcal/day, (b) 1.6 lbs, (c) 70 g/day.
(a) To calculate the daily energy/calorie needs for this individual:
1. BMR: Use the BMR equation for a female: 0.9 kcal/kg body weight per hour. Multiply this by her body weight and the hours per day: (0.9 kcal/kg) x (70 kg) x (24 hours/day) = 1512 kcal/day.
2. Activity: Multiply her BMR by the activity coefficient (30% for a sedentary activity level): (1512 kcal/day) x 0.3 = 454 kcal/day.
3. TEF: Use 5% to calculate her TEF: (1512 + 454) x 0.05 = 98 kcal/day.
4. Total Energy Intake: Add her BMR, activity, and TEF values: 1512 + 454 + 98 = 2064 kcal/day. Since she is gaining weight at 100 kcal/day, her total energy intake is 2164 kcal/day.
To find out how much weight she would gain in 8 weeks (in theory), first calculate the total calories gained in 8 weeks: 100 kcal/day x 7 days/week x 8 weeks = 5600 kcal. Since 1 lb of body weight is roughly equivalent to 3500 kcal, divide the total gained calories by 3500 kcal/lb: 5600 kcal ÷ 3500 kcal/lb = 1.6 lbs.
To find her RDA for protein (g/day), use the RDA for protein which is 1 g/kg per day. Multiply this by her body weight: (1 g/kg) x (70 kg) = 70 g/day.
Your answer: (a) 2164 kcal/day, (b) 1.6 lbs, (c) 70 g/day.
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