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ivanzaharov [21]
2 years ago
15

Find the volume of each figure to the nearest tenth. Use 3.14 for No viruses please

Mathematics
1 answer:
ludmilkaskok [199]2 years ago
6 0

Answer:

1) 188.4 in³

2)306 in³

3)210in³

Step-by-step explanation:

1) r = 5in   h = 12in

5 * 12 * 3.14

2) L = 3    W = 8.5     H = 12

3 * 8.5 * 12

3) \frac{1}{2} ( B = 5    W = 7    H =  12)

.5(5 * 7 * 12)

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How many moles of oxygen are required to burn 3.0 mole of C10H8 (naphthalene)?
astra-53 [7]

Answer: 36 moles oxygen

Step-by-step explanation:

C10H8 + 12O2 ====》 10CO2 + 4H2O

From the equation of the reaction,

1 mole of napth requires 12 moles of O2

3 moles of napth would require x moles O2

X = (3 * 12) / 1

X = 36 moles of oxygen.

Therefore 3 moles of naphtalene (C10H8) would require 36 moles of oxygen

6 0
3 years ago
There are 70 students in the school band. 40% of them are sixth graders, 20% are seventh graders, and the rest are eighth grader
8090 [49]

Answer:

40%

Step-by-step explanation:

40% of 70 is 28

20% of 70 is 14

so there are 28 8th graders 28 is 40% of 70

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8 0
3 years ago
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For simple linear regression, y = β0 + β1x + u, which one of the following statements is true?
RSB [31]

Answer:

Option a) u is called the "error term". It is the error we make in prediction

Option d) x is called the independent variable because x is independent from y and u.

Step-by-step explanation:

We are given the following information in the question:

y = \beta_0 + \beta_1x + u

where y is the dependent variable, x is the independent variable.

\beta_0: It is the value of y when x is zero, that is y-intercept.

\beta_1: It is the coefficient of x in predicting the dependent variable y.

u is the error term.

  • An error term represents the margin of error.
  • It refers to the sum of the deviations within the regression line, that is the difference between the predicted value and the observed value of y.

Thus, Option A) u is the error term and Option D)  x is called the independent variable because x is independent from y and u are the correct answer.

6 0
3 years ago
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Answer:

B. (x+2) is a factor

Step-by-step explanation:

3x^2 -x-14

3x^2+6x-7x-14

3x(x+2)-7(x+2)

(3x-7)(x+2)

so, x+2 is a factor of 3x^2-x-14

8 0
3 years ago
Items 17-18: Use the diagram to the right. I just need 17-18 please and thank you!!!
mixer [17]

Answer:

17. (B)

18. both opposite sides are equal in length and height.

Step-by-step explanation:

5 0
3 years ago
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