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2 years ago

The refrigerator part of a refrigerator-freezer has a volume of 27 cubic feet.

Mathematics

2 answers:

scZoUnD [109]2 years ago

6 0

Answer:

324 cubic feet

Step-by-step explanation:

disa [49]2 years ago

4 0

Answer:

39 cubic feet

Step-by-step explanation:

2*2*3=12 12+27=39

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Which expression is equal to 2.5 + (2.5+3.5

aleksandr82 [10.1K]

Answer:

Where are the choices

Step-by-step explanation:

4 0

2 years ago

If x = a cosθ and y = b sinθ , find second derivative

Olin [163]

I'm guessing the second derivative is for <em>y</em> with respect to <em>x</em>, i.e.

$\dfrac{\mathrm d^2y}{\mathrm dx^2}$

Compute the first derivative. By the chain rule,

$\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{\mathrm dy}{\mathrm d\theta}\dfrac{\mathrm d\theta}{\mathrm dx}=\dfrac{\frac{\mathrm dy}{\mathrm d\theta}}{\frac{\mathrm dx}{\mathrm d\theta}}$

We have

$y=b\sin\theta\implies\dfrac{\mathrm dy}{\mathrm d\theta}=b\cos\theta$

$x=a\cos\theta\implies\dfrac{\mathrm dx}{\mathrm d\theta}=-a\sin\theta$

and so

$\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{b\cos\theta}{-a\sin\theta}=-\dfrac ba\cot\theta$

Now compute the second derivative. Notice that $\frac{\mathrm dy}{\mathrm dx}$ is a function of $\theta$ ; so denote it by $f(\theta)$ . Then

$\dfrac{\mathrm d^2y}{\mathrm dx^2}=\dfrac{\mathrm df}{\mathrm dx}$

By the chain rule,

$\dfrac{\mathrm d^2y}{\mathrm dx^2}=\dfrac{\mathrm df}{\mathrm d\theta}\dfrac{\mathrm d\theta}{\mathrm dx}=\dfrac{\frac{\mathrm df}{\mathrm d\theta}}{\frac{\mathrm dx}{\mathrm d\theta}}$

We have

$f=-\dfrac ba\cot\theta\implies\dfrac{\mathrm df}{\mathrm d\theta}=\dfrac ba\csc^2\theta$

and so the second derivative is

$\dfrac{\mathrm d^2y}{\mathrm dx^2}=\dfrac{\frac ba\csc^2\theta}{-a\sin\theta}=-\dfrac b{a^2}\csc^3\theta$

4 0

3 years ago

Plssss help me with this thx im not good at math

Marina CMI [18]

The answer is c 25 minutes btw hope you have a wonderful day

8 0

2 years ago

Solve this plssssssssssss

Kobotan [32]

Answer:

2 x^ (3/2)

Step-by-step explanation:

(x^2+x^2)

----------------

x^1/2

Combine like terms

2x^2

-----------

x^1/2

When dividing exponents with the same base, we subtract

a^b/ a^c = a^ (b-c)

2 * (x^2/ x^1/2) = 2( x^(2-1/2)) = 2 * x^ (3/2)

4 0

3 years ago

The equation y=0.52x+157 gives the cost y of renting a car if the care is driven x

Nadya [2.5K]

Answer is $0.52 increase per mile

Reason

In the y intercept form, y=mx + b
the “m” is the slope or rate of change, in this case it is the $ rate that will be multiplied by the variable “x” which would be the changing number of miles driven.
“B” is the starting point or base price that doesn’t change which is 157.

7 0

11 months ago