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Marina CMI [18]
3 years ago
15

The Natchez Trace Bridge in Franklin, Tennessee, is 1,500 feet long. Suppose you build a model of the bridge using a scale of 1

inch:25 feet. How long is the model? (Hint: 12 inches = 1 foot).
a.
5 ft
c.
7 ft
b.
6 ft
d.
8 ft
Mathematics
2 answers:
schepotkina [342]3 years ago
8 0
The answer would be A) 5ft. Hope this helps! I'll explain it in the comments if you want me too.
klio [65]3 years ago
3 0
Hello!
The answer should be letter a! (5ft)!
Hope this helps!
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2) Complete the table.<br>x<br>20<br>200<br>2000<br>15<br>20​
Dimas [21]
I think it’s 25 but I’m not too sure
3 0
3 years ago
Write an addition problem that has 9/10 as the sum
kicyunya [14]
There are a number of different problems that you could do that will give you an outcome of 9/10
For example, 1/2 and 2/5 add up to 9/10.
3/10 and 6/10 also add up to 9/10.

Find the sum of 7/10 and 1/5
Find the sum of 7/20 and 11/20
Find the sum of 1/2 and 3/10 and 1/10
Find the sum of 1/5 and 2/5 and 3/10

Hope this helps :) 
3 0
3 years ago
What is the length side of a triangle that has vertices at (-5, -1), (-5, 5), and (3, -1)?
Rasek [7]

The side lengths of triangle are 6 units, 8 units and 10 units.

<u>SOLUTION: </u>

Given that, we have to find what is the length side of a triangle that has vertices at (-5, -1), (-5, 5), and (3, -1)  

We know that, distance between two points P\left(x_{1}, y_{1}\right) \text { and } Q\left(x_{2}, y_{2}\right) is given by  

P Q=\sqrt{\left(x_{2}-x_{1}\right)^{2}+\left(y_{2}-y_{1}\right)^{2}}

Now,  

\begin{array}{l}{\text { Distance between }(-5,-1) \text { and }(-5,5)=\sqrt{(-5-(-5))^{2}+(5-(-1))^{2}}} \\\\ {\qquad \begin{array}{l}{=\sqrt{(-5-(-5))^{2}+(5-(-1))^{2}}} \\\\ {=\sqrt{(0)^{2}+(5+1)^{2}}=\sqrt{(6)^{2}}=6} \\\\ {=\sqrt{(-5)^{2}+(5+1)^{2}+(5-(-1))^{2}}} \\\\ {=\sqrt{(-8)^{2}+(5+1)^{2}}=\sqrt{64+36}=\sqrt{100}=10} \\\\ {=\sqrt{(3-1)^{2}+(-1-(-1))^{2}}} \\\\ {=\sqrt{(5+3)^{2}+(0)^{2}}=\sqrt{(8)^{2}}=8}\end{array}}\end{array}

8 0
3 years ago
I need the answer to finding the reciprocal of -72÷(-9)
lbvjy [14]
First lets do the math...
-72 / -9 = 8

the reciprocal of a number is just flipping the number.
example : the reciprocal of 2/3 = 3/2.....the reciprocal of 6/7 = 7/6...and when u have a whole number, put it over 1...

so the reciprocal of 8, or 8/1 is gonna be 1/8 <==

or u could do it this way...
reciprocal of -72 / -9 = -9 / -72, which equals 1/8
5 0
3 years ago
The life in hours of a thermocouple used in a furnace is known to be approximately normally distributed, with standard deviation
Effectus [21]

Answer:

62 is the minimum sample size needed

Step-by-step explanation:

We know that the population is approximately normally distributed so we will use a z-score for 95% confidence, which is 1.96.  We are given the population standard deviation of σ = 20, and are given that the error should be 5 or less hours.  The fact that it gives us sample data is irrelevant since we are told the population is approximately normally distributed and are given the population standard deviation.

See the attached photo for the calculation of the minimum sample size

8 0
3 years ago
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