Question

7 of 10
calories used per hour

activity	calories	activity	calories
studying	105	washing dishes	180
eating	125	playing table tennis	230
typing	140	lifting weights	500
lying down	75	standing	125
slow walking	225	fast walking	300
biking	900	jogging	550

what is the lowest number of calories used if you did three different activities?
o 270 calories
o 280 calories
o 285 calories
o 295 calories

Explanation:

Step1: Identify lowest - calorie activities

We need to find the three lowest - calorie activities from the table. They are lying down (75 calories), standing (125 calories), and studying (105 calories).

Step2: Calculate total calories

Add the calorie values of these three activities: $75 + 105+125$.
$75+105 + 125=(75 + 105)+125=180+125 = 305$ (There is a mistake above. Let's correct it).
The three lowest - calorie activities are lying down (75 calories), sitting in class (100 calories), and studying (105 calories).
The sum is $75+100 + 105=(75+100)+105=175+105=280$ calories.

Answer:

280 calories