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Kay [80]
3 years ago
6

James knows that when he walks, he takes about 120 steps per minute and that each step is 2.75 feet long. Which calculation is m

ost reasonable for James to use to find out his walking speed in miles per hour?
Mathematics
2 answers:
Inessa05 [86]3 years ago
4 0

Answer:

James can walk 3.75 miles per hour

Step-by-step explanation:

We can use conversion factors to determine the walking speed of James in miles per hour.

James takes 120 steps/minute with each step 2.75 feet long.

∴ If one step is equal to 2.75 feet then 120 steps per minute is:

= 2.75 (feet/step) × 120(steps/minute)

Where steps cancel out and you are left with:

= 330 feet/minute

1 Foot is equal to 0.00018939 miles. Therefore we can determined miles per hour as:

= (330 feet/minute) × (0.00018939miles/foot) × (60 minutes/1 hour)

Feet cancels out with the foot and minutes cancel out with minutes and you are left with:

= 3.75 miles/hour

mafiozo [28]3 years ago
3 0
Speed=120step/min=720step/h
Distance=720step/h×2.75feet/step=1980feet/h=0.375miles/h
So the answer is: he can walking 0.375miles per hour

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Joe borrowed $5,000 from the bank at a rate of 7% simple interest per year. How much interest did he pay in 7 years?
yaroslaw [1]

Answer:

$2450

Step-by-step explanation:

7% of 5000 is 350 which means that she would be paying $350 a year and so if you multiply the amount she pays a year ($350) you would get $2450.

I hope this helps.

5 0
3 years ago
Read 2 more answers
Urgent Question, 50 points and will mark brainliest.
lbvjy [14]

A key feature is there is a constant y-value level between x values from 0 to 15 and there is a parabolic curve from x-values of 15 to 65. The vertex is at (3, 45)

<h3>How to get the relationship between graphs?</h3>

A) This is a parabolic graph and from the graph, we see that, the y-values remain the same from x-values of 0 to 15. Thereafter the x-values increases with a corresponding decrease in y-values until the vertex point before increase in x-values with corresponding increase in y-values.

A relationship could be: Battery percentage remains at the mark of 40 for the first 15 minutes of use. Thereafter, it begins to decrease parabolically until 45 minutes when it it is almost at 0 level and is charged before it starts to increase in a parabolic manner again for another 20 minutes when it increases linearly.

B) A key feature is there is a constant y-value level between x values from 0 to 15 and there is a parabolic curve from x-values of 15 to 65. The vertex is at (3, 45)

Read more about Graph relationships at; brainly.com/question/13060180

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3 0
2 years ago
The length, in millimeters of each side of a square shaped electronic chip is a rational number. What statement is true about th
AVprozaik [17]

Answer:

The diagonal is irrational because it is a product of a rational and an irrational number

Step-by-step explanation:

The options are not given. However, the question is still answerable.

Given

Shape: Square

Length: Rational

Since the side length is said to be rational, I'll answer the question based on whether the diagonal is rational or not.

Having said that:

The diagonal (d) of a square with side length (l) is calculated using Pythagoras theorem.

d^2 = l^2 + l^2

d^2 = 2l^2

Take positive square root of both sides

d = \sqrt{2l^2}

Split:

d = \sqrt{2} * \sqrt{l^2}

d = \sqrt{2} *l

Recall that the side length (l) is rational.

However, \sqrt 2 is irrational.

So, the product of l and \sqrt 2 will be irrational

Hence:

The diagonal is irrational

8 0
3 years ago
A vector is used to express a car's change in position, or displacement, by tracking its motion over a large area defined by a c
Mnenie [13.5K]

Answer:

The correct answer is option C: (8, 14).

Step-by-step explanation:

The car's displacement in vector form can be found by subtracting the initial points from the final points.    

Initial: (x₁, y₁) = (-3, -5)

Final: (x₂, y₂) = (5, 9)          

For the x-coordinate, we have:  

d_{x} = x_{2} - x_{1} = 5 - (-3) = 8

And for the y-coordinate, we have:

d_{y} = y_{2} - y_{1} = 9 - (-5) = 14

The car's displacement in vector form is:

d = (d_{x}, d_{y}) = (8, 14)  

Therefore, the correct answer is option C: (8, 14).

I hope it helps you!                        

7 0
3 years ago
Rational numbers are numbers that can be written as the ______ of _____. What are the blanks?​
BARSIC [14]

Answer:

rational numbers are numbers that can be written as the ratio of two integers

5 0
3 years ago
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