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TEA [102]
4 years ago
15

Yeah so 5mi/h =?km/h​

Mathematics
1 answer:
tamaranim1 [39]4 years ago
8 0

Answer:

80 kilometers

Step-by-step explanation:

Since the number of miles and number of km is over one hour, the only thing you need to worry about it the number of miles in a kilometer (the numerator).

1 mile is approximately 1.60934 kilometers, so to find how many kilometers are in 50 miles, you would multiply 1.60934 by 50.

  • 1.60934 * 50 = 80.467

Since 50 miles is rounded to the nearest whole number, I expect that the kilometers should be given in the nearest whole number, so the final answer is 80 kilometers.

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Find the circumference of a circle that has an area of 452.16 square meters. (Use 3.1416 as the value of π.)
laila [671]
\bf \textit{area of a circle}\\\\
A=\pi r^2\quad 
\begin{cases}
r=radius\\
-----\\
A=452.16
\end{cases}\implies 452.16=\pi r^2\implies \cfrac{452.16}{\pi }=r^2
\\\\\\
\boxed{\sqrt{\cfrac{452.16}{\pi }}=r}\\\\
-------------------------------\\\\
\textit{circumference of a circle}\\\\
C=2\pi r\qquad \qquad \implies C=2\pi \left( \boxed{\sqrt{\cfrac{452.16}{\pi }}} \right)

so, is just that product, recall to use "<span>3.1416 as the value of π".</span>
7 0
3 years ago
Really need this answered :/ thank you
VladimirAG [237]

Answer:

i believe its the third one don't quote me on that though

Step-by-step explanation:


5 0
3 years ago
Solve 2x+6 ≤ 10 or 2x + 8 &gt; 20.
Firlakuza [10]

Answer:

<h2>A. x ≤2 or x>6</h2>

Step-by-step explanation:

2x+6 ≤ 10  or  2x + 8 > 20

⇔ 2x ≤ 4  or  2x > 12

⇔ x ≤ 2  or  x > 6

6 0
2 years ago
A past study claims that adults in America spend an average of 17 hours a week on leisure activities. A researcher wanted to tes
8090 [49]

Answer:

The claim is false.

Step-by-step explanation:

Given the data :

13 24 21 37 15 25 18 22 40 32

The sample mean and standard deviation can ben calculated for the given sample.

Using calculator :

Sample mean, xbar = 24.7

Sample standard deviation, s = 9.04

Sample size, n = 10

The hypothesis :

H0 : μ = 17

H1 : μ ≠ 17

The test statistic :

(xbar - μ) ÷ (s/√(n))

(24.7 - 17) ÷ (9.04/√(10))

7.7 / 2.8586990

Test statistic = 2.694

We can obtain the Pvalue, at α = 0.05 ; df = n-1 = 9

Pvalue = 0.0246

Since Pvalue < α ; we reject the null ; Hence, there is significant evidence to conclude that an adult American does not spend average of 17 hours in leisure

5 0
3 years ago
Graph the point (-10,-7) on the coordinate plane
Anuta_ua [19.1K]
I think that’s right
7 0
3 years ago
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