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MArishka [77]
3 years ago
9

The temperature has been going down at a constant rate. in 5 hours it went down 15 degrees. which expression best shows the temp

erature change each hour?
Mathematics
2 answers:
Vinvika [58]3 years ago
6 0

<em>Answer: The correct answer is : </em>

<em>-15 divided 5</em>

<em />

V125BC [204]3 years ago
4 0

Answer:


Step-by-step explanation:

-15 divided by 3

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A salesperson earns a commission of $459 for selling $2700 in merchandise find the commission rate. Write the answer as a percen
kogti [31]
459/2700=17/100 which translates to 17%.

4 0
3 years ago
How do you solve secx-2=0
siniylev [52]
It will be secx = 2
or, cosx = 1/2
or x = Π/3 , 5Π/3
5 0
3 years ago
Your firm has a contract to make staff uniforms for a fast-food retailer. The heights of the staff are normally distributed with
FromTheMoon [43]

Answer:

a) 16%

b) 2.5%

Step-by-step explanation:

a)

The mean is 70 with standard deviation(SD) of 3 and you are asked to find out the percentage of staff that have <67(70-3 inch= mean - 1 SD) inch size, which means 1 SD below the mean (<-1 SD). Using 68-95-99.7 rule, you can know that 68% of the population is inside 1 SD range from the mean ( -1 SD to + 1 SD).

To put it on another perspective, there are 32% of the population that have < -1 SD and > +1 SD value. Assuming the distribution is symmetrical, then the value of < - 1 SD alone is 32%/2= 16%

b)

The question asks how many populations have size >76 inches, or mean + 2 SD (70+3*2 inch).

You can also solve this using 68-95-99.7 rule, but you take 95% value as the question asking for 2 SD instead.  Since 95% of population is inside 2 SD range from the mean ( -2 SD to + 2 SD), so there are 5% of population that have < -2 SD and > +2 SD value. Assuming the distribution is symmetrical, then the value of > +2 SD alone is 5%/2= 2.5%

3 0
3 years ago
In abc above,what is the length of ad​
Nezavi [6.7K]

Answer:

B

Step-by-step explanation:

First calculate BD using sine ratio in Δ BCD and the exact value

sin60° = \frac{\sqrt{3} }{2}, thus

sin60° = \frac{opposite}{hypotenuse} = \frac{BD}{BC} = \frac{BD}{12} = \frac{\sqrt{3} }{2} ( cross- multiply )

2BD = 12\sqrt{3} ( divide both sides by 2 )

BD = 6\sqrt{3}

-----------------------------------------------------------

Calculate AD using the tangent ratio in Δ ABD and the exact value

tan30° = \frac{1}{\sqrt{3} } , thus

tan30° = \frac{opposite}{adjacent} = \frac{AD}{BD} = \frac{AD}{6\sqrt{3} } = \frac{1}{\sqrt{3} } ( cross- multiply )

\sqrt{3} AD = 6\sqrt{3} ( divide both sides by \sqrt{3} )

AD = 6 → B

4 0
3 years ago
on another training ride jana bikes 15 miles in 50 minutes explain how you could find the number of miles she bikes in 1 hour ex
Oksi-84 [34.3K]
So she is going 15 miles every 50 minutes...
5 0
3 years ago
Read 2 more answers
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