Question

A​ 150-pound person uses 6.7 6.7 calories per minute when walking at a speed of 4 mph. How long must a person walk at this speed to use at least 170 170 ​calories? A person must walk for at least nothing minutes in order to use at least 170 170 calories. ​(Round up to the nearest​ minute.) Enter your answer in the answer box.

Answer 1

To use at least 170 calories, a person must walk for at least 26 minutes at a speed of 4 mph.

Step-by-step explanation:

To find out how long a person must walk at a speed of 4 mph to use at least 170 calories, we can set up a proportion using the given information. We know that a 150-pound person uses 6.7 calories per minute when walking at this speed. Let's use 'x' to represent the number of minutes it takes to use at least 170 calories:

6.7 calories / 1 minute = 170 calories / x minutes

Cross multiply and solve for 'x':

6.7x = 170

x = 170 / 6.7

x ≈ 25.37

Rounding up to the nearest minute, the person must walk for at least 26 minutes to use at least 170 calories.

Answer 2

A person must walk for 25.37 minutes in order to use 170 calories.

Step-by-step explanation:

A​ 150-pound person uses 6.7 calories per minute when walking at a speed of 4 mph.

Let the person takes x minutes to walk at this speed.

So, the time needed to burn 170 calories is given by:

`6.7x=170`

Solving for x, we get;

x = 25.37 minutes

Hence, A person must walk for 25.37 minutes in order to use 170 calories.