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aleksley [76]
3 years ago
12

What is the surface area of this wedge.?

Mathematics
1 answer:
alexandr1967 [171]3 years ago
5 0

Answer:

the surface area of the wedge is 360ft²

Step-by-step explanation:

6x5x3x4 = 360ft²

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Which of the following functions are solutions of the differential equation y'' + y = 3 sin x? (select all that apply)
DiKsa [7]

Answer:

C

Step-by-step explanation:

We must compute the derivatives and check if the equation is satisfied.

A. y'=(3\sin x)'=3\cos x. Differentiate again to get y''=(3\cos x)'=-3\sin x, then y''+y=-3\sin x+3\sin x=0\neq 3\sin x so this choice of y doesn't solve the equation.

B. y'=3\sin x+3x\cos x-5\cosx +5x\sin x=(5x+3)\sin x+(3x-5)\cos x and y''=5\sin x+(5x+3)\cos x+3\cos x-(3x-5)\sin x=(10-3x)\sin x+(5x+6)\cos x, then y''+y=10\sin x+6\cos x\neq 3\sin x so y is not a solution

C. y'=\frac{-3}{2}\cos x+\frac{3}{2}x\sin x hence y''=\frac{3}{2}\sin x+\frac{3}{2}\sin x+\frac{3}{2}x\cos x=3\sin x+\frac{3}{2}x\cos x. Then y''+y=3\sin x+\frac{3}{2}x\cos x-\frac{3}{2}x\cos x=3\sin x so y is a solution.

D.y'=-3\sin x and y''=-3\cos x, then y''+y=0 thus y isn't a solution

E. y'=\frac{3}{2}\sin x+\frac{3}{2}x\cos x hence y''=\frac{3}{2}\cos x+\frac{3}{2}\cos x-\frac{3}{2}x\sin x=3\cos x-\frac{3}{2}x\cos x. Then y''+y=3\cos x-\frac{3}{2}x\cos x-\frac{3}{2}x\cos x=3\cos x\neq 3\sin x then y is not a solution.

3 0
3 years ago
Find the missing value using the given slope. (-3, -4) and (-5, y); m=-9/2
tatiyna
The missing value is 5.


please vote my answer brainliest. thanks!
6 0
3 years ago
Show your work<br><br> v= pi(3.14)r^2h
ddd [48]

Answer: 2000.18 unit^3

Step-by-step explanation:

radius = 14 / 2 = 7

V of cylinder = π x r^2 x h

= 3.14 x 7^2 x 13

= 3.14 x 49 x 13

= 2000.18 unit^3

8 0
1 year ago
When critiquing an observational study, which four factors should be analyzed?
vazorg [7]

Answer:

Option:A

Step-by-step explanation:

The observation study involves

1) Methodology:

"Methodology is the philosophical framework within which the research is conducted or the foundation upon which the research is based”

2) Result:

Results section is just a presentation of the data. The results need to be presented in enough detail for someone not familiar with the scientific paper to understand them.

3) Discussion:

It unrolls the main results, explain their meanings. Put there the new questions and perspectives, describe the most interesting points for the entire field. Define the possible answers, write down why and how and what for, your suggestions.

4)Conclusion:

It is a summary of the discussion or the whole work. You can put there the main points and results, their factual meaning for the field and a possible further direction. I like to describe this as "discussion's points and facts without the discussion."


6 0
3 years ago
Read 2 more answers
The table shows values for functions f(x) and g(x)
bekas [8.4K]
0,1,2 is the correct answer
8 0
3 years ago
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