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3 years ago

A person runs 1 4/5 miles in 1/5 of an hour. Determine how many miles they are running per hour

Mathematics

1 answer:

Mashcka [7]3 years ago

3 0

Answer: 9 miles per hour.

Step-by-step explanation:

In 1 hour they would run (1 4/5)/(1/5) = (9/5)*5 = 9 hours. So, they are running 9 miles per hour.

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Let’s assume that human body temperatures are normally distributed with a mean of 98.20° F and a standard deviation of 0.62° F.

uysha [10]

Answer: It is such a small percentage of the population that would be considered to have fever at that level.

So, it is not appropriate stringent standard.

Step-by-step explanation:

Since we have given that

Mean = 98.20°F

Standard deviation = 0.62°F

If Bellevue Hospital in New York City uses 100.6°F as the lowest temperature considered to be a fever.

So, $\bar{X}=100.6^\circ F$

So, using the normal distribution, we first find the value of z.

$z=\dfrac{\bar{x}-\mu}{\sigma}\\\\x=\dfrac{100.6-98.2}{0.62}\\\\z=3.87$

Since z = 3.87

So, p = 0.0001 =0.1%

So,It is such a small percentage of the population that would be considered to have fever at that level.

So, it is not appropriate stringent standard.

4 0

3 years ago

A study is done to compare the fuel efficiency of cars. The first group of cars generally get about 36 miles per gallon. The sec

natta225 [31]

Answer:C

Step-by-step explanation:

5 0

3 years ago

Which table shows a constant rate of change? A Days 6 12 18 Earnings ($) 225 450 750 B Days 6 12 18 Earnings ($) 225 500 750 C D

Rasek [7]

I need points sorry to do this

8 0

3 years ago

What should be multiplied by the expression in the image to obtain the smallest square

makkiz [27]

Answer:

2xy

Step-by-step explanation:

Here, we want to obtain the number with the smallest square

To get this, we simply find the nearest number square which is 2

The nearest x squared which is x (to get x^4)

The nearest y squared which is y (to get y^2)

Thus, the smallest number so we get a square will be; 2xy

4 0

3 years ago

PLEASE HELP TIMED TEST What is the value of x in the matrix equation below?

Ksivusya [100]

Answer:

x = 1

Step-by-step explanation:

Given the matrix;

$-2\left[\begin{array}{ccc}x&-1\\3&5\end{array}\right] + \left[\begin{array}{ccc}3&8\\-1&6\end{array}\right] = \left[\begin{array}{ccc}x&10\\-7&-4\end{array}\right]$

Converting to equations

From the first row of each matrices

-2x + 3 = x

Collect the like terms

-2x - x = -3

-3x = -3

x = -3/-3

x = 1

Hence the value of x is 1

7 0

3 years ago