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Roman55 [17]
3 years ago
10

this is due today help please!!!!!! A study involving middle-aged adults was designed to determine the relationship between the

amount of caffeine consumed during the day and the time required to fall asleep at night. What are the independent and dependent variables for this study? A. The independent variable is the amount of caffeine consumed, and the dependent variable is the time required to fall asleep. B. The independent variable is the amount of caffeine consumed, and the dependent variable is the age of the people. C. The independent variable is the time required to fall asleep, and the dependent variable is the amount of caffeine consumed.. D. The independent variable is the age of the people, and the dependent variable is the time required to fall asleep.
Mathematics
1 answer:
IceJOKER [234]3 years ago
4 0
The answer should be c because the independent variable should not be manipluated. 
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Mr. Britt is pouring a 36' x 58' concrete pad for a metal building. If concrete costs
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Answer:

Step-by-step explanation:

8 in × (1 ft)/(12 in) = ⅔ ft

36 ft × 58 ft × ⅔ ft = 1392 ft³

1392 ft³ × (1 yd³)/(27 ft³) ≅ 52 yd³

52 yd³ × $123/yd³ = $6396

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3 years ago
Solve for x<br> 4(1 - x) + 2x = -3 (x + 1)
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Answer:

x = -7

Step-by-step explanation:

4(1 - x) + 2x = -3 (x + 1)

4 - 4x + 2x = - 3x - 3

- 4x + 2x + 3x = - 3 - 4

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A tabletop in the shape of a trapezoid has an area of 7,701 square centimeters. Its longer base measures 119 centimeters, and th
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Answer:

75.5 cm

Step-by-step explanation:

S = (a+b)*h/2

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2 years ago
Juana threw five darts at a dartboard. The possible scores on the target were 2, 4, 6, 8, and 10. Each dart hit the target. Whic
Salsk061 [2.6K]

Answer:

Not possible scores: 6, 15, 23, 31 and 58.

Step-by-step explanation:

We have been given that Juana threw five darts at a dartboard. The possible scores on the target were 2, 4, 6, 8, and 10. Each dart hit the target. We are asked to choose the total scores that can be quickly identified as "not possible".

Given scores: 38, 23, 58, 30, 42, 31, 26, 6, 14, or 15.

Since the maximum score is 10 and number of hits are 5, therefore, the maximum score can be hitting 10 each of the 5 times.

10\times 5=50

Since the maximum score is 50, therefore, 58 is an impossible score.

Since the minimum score is 2 and number of hits are 5, therefore, the minimum score can be hitting 2 each of the 5 times.

2\times 5=10

Since the minimum score is 10, therefore, 6 is an impossible score.

Since all scores on board are even, so the sum of 5 hits must be even, therefore, odd numbers like 15, 23, 31 are not possible scores.  

5 0
2 years ago
Help! Solve these, please!
jeyben [28]

Answer:

The area of the triangle is 25 units

Step-by-step explanation:

3 0
2 years ago
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