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3 years ago

13

Mr. green is putting lights around 8 windows; each window is 1 and a half metres wide and 2 metres long. how many metres of ligh

ts does he need

1 answer:

rodikova [14]3 years ago

8 0

1 1/2 + 1 1/2 + 2 +2 = a
a(8) = answer

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Simply the following expression 35 +(-13)+(8)-(-6)

soldier1979 [14.2K]

35 + (-13) + (8) - (-6)

22 + (8) - (-6)

30 - (-6)

36

7 0

3 years ago

Perform the Indicated operatlon.<br>(-10) ÷ (-20)<br>a)-2<br>b)2<br>c)1/2<br>d)-1/2

Nuetrik [128]

Answer:c

Step-by-step explanation of the

(-10)/(-20)

-1/(-2)

Negative sign result in positive result, so

1/2; c

4 0

3 years ago

Previously 5% of mothers smoked more than 21 cigarettes during their pregnancy. An obstetrician believes that the percentage of

mr Goodwill [35]

Answer:

p value = 0.03514

Step-by-step explanation:

Hypotheses would be

$H_0: p = 0.05\\H_a: p$

(left tailed test at 10% level of significance)

Here p stands for the sample proportion of mothers smoked more than 21 cigarettes during their pregnancy.

Sample size =130

persons who smoked = 2

Sample proportion = $\frac{2}{130} \\=0.0154$

Assuming H0 to be true

Std error= $\sqrt{0.05*0.95/130} \\=0.01911$

p difference = -0.0346

Test statistic z=-1.81

p value = 0.03514

Since p is less than 0.10, significance level, we reject H0

4 0

2 years ago

how many square feet of paper do you need to cover a cube with a side 10 in. long? Round your answer to two decimal places

Ket [755]

The answer should be A.=4.17 sq ft

8 0

2 years ago

Read 2 more answers

What is the slope of the line shown below?<br><br> A. -3<br> B.-6<br> C.6<br> D. 3

aniked [119]

Answer:

D.3

Step-by-step explanation:

We are going to use the Slope Formula --> (y2-y1)/(x2-x1)

(9-3)/(3-1)=6/2=3

6 0

2 years ago