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VARVARA [1.3K]
3 years ago
7

A teacher recommends that students read for 20 minuets each night

Mathematics
1 answer:
Alex777 [14]3 years ago
7 0
They will improve their vocabulary and improve their brain skills to figure out what they want to know.
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A 1.5-meter snake lives in the ceiling of a college’s Chemistry Building. One day, she decides to go outside, and slithers throu
lubasha [3.4K]

Answer:

The~answer~for~this~question~is:135,000

Step-by-step explanation:

→ It's~quite~simple~actually.~Here~let~me~show~you:

15 × 90=1350

→ Now,~we~take~1350~and~multiply~it~with~100:

1350 × 100=135,000

Easy~isn't?~Hope~this~helped!

7 0
3 years ago
a local company uses 13 1/2 tons of paper in one week. It recycles about 1/3 of its waste. how many tons of paper does the compa
bogdanovich [222]

Answer:

4 1/2 tons of recycled paper

Step-by-step explanation:

13.5/3 = 4.5 or 4 1/2

3 0
2 years ago
(23.01) In a randomized comparative experiment on the effect of dietary calcium on blood pressure, researchers divided 58 health
Paul [167]

Answer:

113.7-2.154\frac{9.1}{\sqrt{29}}=110.06    

113.7+2.154\frac{9.1}{\sqrt{29}}=117.34    

And the 96% confidence is given by (110.06; 117.34)

Step-by-step explanation:

Information given

\bar X=113.7 represent the sample mean

\mu population mean (variable of interest)

s=9.1 represent the sample standard deviation

n=29 represent the sample size  

Confidence interval

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

The degrees of freedom are given by:

df=n-1=29-1=28

The Confidence is 0.96 or 96%, the significance is \alpha=0.04 and \alpha/2 =0.02, and the critical value would be t_{\alpha/2}=2.154

Replacing the info we got:

113.7-2.154\frac{9.1}{\sqrt{29}}=110.06    

113.7+2.154\frac{9.1}{\sqrt{29}}=117.34    

And the 96% confidence is given by (110.06; 117.34)

5 0
3 years ago
The sum of two number is 17. their driffrence is 27.write a system of equations that describe this situation. solve to find the
STatiana [176]
A) x + y = 17
B) x - y = 27
Adding both equations:2x = 44
x = 22
y = -5


6 0
3 years ago
Y = x^2 + 6x + 4<br><br>Find the vertex<br>And please explain how I don't understand.
Bond [772]

Answer:

(-3, -5) This is my answer I hope it helps

3 0
3 years ago
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