A 150-pound person uses 5.2 calories per minute when walking at a speed of 4 mph. How long must a person walk at this speed to use at least calories?

5.2 cal. 10.4 cal. 15.6 cal.

1 minute. 2min. 3 min

5.2(x)=calories multiplied by the the time spent walking equals the total calories burned.

×=time

d) 30 units^2

area of rectangle = l × b

we know,

length = 10 unit

breadth = 3 unit

applying the formula,

= l × b

= 10 × 3

= 30 unit^2

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step-by-step explanation: