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2 years ago

A track has the shape shown. What is the perimeter (round to three decimal places)?

Mathematics

2 answers:

MA_775_DIABLO [31]2 years ago

5 0

Answer:

the correct answer is

B). 22.566

Naily [24]2 years ago

3 0

Perimeter is all sides added<span />

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A car travels to 253 miles in eight hours how far can you travel in seven hours?

slava [35]

<h2><u>DIRECT RULE OF 3</u></h2>

We use a rule of 3 to solve it.

Let's record the data:

253 miles → 8 hours

‎ x miles → 7 hours

‎

Let's solve:‏‏‎

$\mathsf{x = \dfrac{7(253)}{8}}$

$\mathsf{x = \dfrac{1771}{8}}$

$\large{\boxed{\mathsf{x = 221,375}}}$

‎ ‏‏‎

<h3><u>Answer</u>. The car can travel 221,375 miles in seven hours.</h3>

‎

8 0

2 years ago

Listed below are pulse rates (beats per minute) from samples of adult males and females. Does there appear to be a difference

MrMuchimi

Answer:

There appears to be a difference between the pulse rates from samples of adult males and females. The average pulse rate of males is 63.75 while that of females is 75.875.

Coefficient of Variation (male) = 33.44%

Coefficient of variation (female) = 28.35%

Step-by-step explanation:

Mean (male) = $\frac{sum of x}{n} =\frac{1020}{16} =63.75$

Mean (female) = $\frac{sum of y}{n} = \frac{1214}{16} = 75.875$

Standard Deviation (male) = $\sqrt{\frac{sum(x-63.75)^2}{16-1} } =21.315$

Standard Deviation (female) = $\sqrt{\frac{sum(y-75.875)^2}{16-1} } = 21.512$

Coefficient of Variation = $\frac{Std dev}{mean} *100$

For male, CV = $\frac{21.315}{63.75} *100=33.44%$ %

For female, CV = $\frac{21.512}{75.875} *100=28.35$ %

Comparison : Pulse rates of males has more variability than that of females since it has a greater coefficient of variation.

5 0

3 years ago

Read 2 more answers

PLEASE HELP!!<br> 4 Digit Lock *<br> Enter 4 digit number code with no spaces

sleet_krkn [62]

3451 now I’m just putting 20 characters to answer lol

6 0

2 years ago

mackenzie has a bag that contains 6red marbles,4 blue marbles and 14 yellow marbles.what is the probability that the marble is n

kipiarov [429]

All marbles together are 24 marbles. 14 of those are yellow marbles. 24 subtract 14 is 10. the probability of the marble not being yellow is 10/24

5 0

2 years ago

Read 2 more answers

A person runs 1/8 mile in 1/64 hour.<br> The person's speed is (BLANK) miles per hour.

snow_tiger [21]

Answer: The person's speed is 8 miles per hour.

Step-by-step explanation:

To solve we want to convert the $\frac{1}{8}$ and $\frac{1}{64}$ proportionally for the number of miles per hour. We know that multiplying a fraction by its reciprocal will equal 1. So let's do that for the value of the hour.

$\frac{1}{64}$ × $\frac{64}{1} =\frac{64}{64} =1$

Since we multiplied that to the number of hours we must also do that for the number of miles.

$\frac{1}{8}$ × $\frac{64}{1} =\frac{64}{8} =8$

7 0

1 year ago