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Bas_tet [7]
3 years ago
8

The ladder in a fire station is 29 feet (ft) tall. The ladder is anchored to the basement floor and the second floor ceiling. Th

e basement floor is 12 feet below ground level. Identify the integers of the ends of the ladder below and above the basement floor
Mathematics
1 answer:
Eduardwww [97]3 years ago
8 0

Answer:

top = 17ft

bottom = -12ft

Step-by-step explanation:

As seen in the badly drawn picture attached in this question we are trying to find the point at the top of the ladder and the point at the bottom of the ladder. As seen in the picture ground level has an altitude of 0 ft meaning that lower than this would be in the negatives. Since the basement floor is 12 feet below ground level then this point would be -12 ft. Now since we know that the ladder is 29ft tall we simply add this height to the basement floor value to get the value of the 2nd floor ceiling (top of the ladder).

29ft + ( -12ft) = 17ft

Therefore we can see that the point at the top of the ladder is 17ft.

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Answer:

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Step-by-step explanation:

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3 0
3 years ago
A Simple random sample of 100 8th graders at a large suburban middle school indicated that 84% of them are involved with some ty
Setler [38]

Answer: a) (0.755, 0.925)

Step-by-step explanation:

Let p be the population proportion of 8th graders are involved with some type of after school activity.

As per given , we have

n= 100

sample proportion: \hat{p}=0.84

Significance level : \alpha= 1-0.98=0.02

Critical z-value : z_{\alpha/2}=2.33  (using z-value table)

Then, the 98% confidence interval that estimates the proportion of them that are involved in an after school activity will be :-

\hat{p}\pm z_{\alpha/2}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}

i.e. 0.84\pm (2.33)\sqrt{\dfrac{0.84(1-0.84)}{100}}

i.e. \approx0.84\pm 0.085

i.e. (0.84- 0.085,\ 0.84+ 0.085)=(0.755,\ 0.925)

Hence, the 98% confidence interval that estimates the proportion of them that are involved in an after school activity : a) (0.755, 0.925)

3 0
3 years ago
1 part sugar and 4 parts of water she uses 3/4 cup of sugar
PolarNik [594]
1 part sugar : 4 parts water

3/4 cup of sugar.

1:4 = 3/4 : x
x = 4 * 3/4
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x = 3 part water

5 0
3 years ago
Expanded form.2(b + c) *
11Alexandr11 [23.1K]

Answer:

Step-by-step explanation:

2b + 2c

4 0
3 years ago
Read 2 more answers
The first term of an arithmetic sequence is -5, and the tenth term is 13. Find the common difference.
Sergeeva-Olga [200]
(A) 1.8

The difference is 18, 13 is bc the tenth term so divide 18 by 10 to get 1.8
7 0
3 years ago
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