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3 years ago

The tubes in a solar collector are filled with _____.

Mathematics

2 answers:

Grace [21]3 years ago

6 0

Coolant fluid is the answer

zheka24 [161]3 years ago

3 0

Filled with a coolant fluid.

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Darnell has

irinina [24]

Answer:

the answer is 28

Step-by-step explanation:

345÷12=28.75

you can't have a 0.75 shirt

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3 years ago

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Solve for x, given the equation Square root of x plus 9 − 4 = 1.

yuradex [85]

√x + 9 - 4 = 1
√x + 5 = 1
√x = -4
√x = √-4
x = 2i

3 0

2 years ago

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What is m=3 and the line goes through the point (2,4) in point - slope form

Inga [223]

Answer:

y-4=3(x-2)

Step-by-step explanation:

y-y1=m(x-x1)

6 0

2 years ago

Can someone help me with this question plzzzzz

Ann [662]

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$7d + d - 4d - 7 = 5d$

$8d - 4d - 7 = 5d$

$4d - 7 = 5d$

$5d = 4d - 7$

Subtract sides 4d

$- 4d + 5d = - 4d + 4d - 7$

$d = - 7$

Thus the correct answer is Option three.

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8 0

2 years ago

a circular oil slick is expanding at a rate of 2m^2/h. Find the rate at which it's diameter is expanding when it's radius is 1.5

aleksandrvk [35]

Answer: $\frac{4\pi}{3} \text{ meter per hour}$

Step-by-step explanation:

The circular oil slick is expanding at a rate of $2 m^2/h$

Let A be the area of the circular oil slick,

So, the changes in A with respect to time (t),

$\frac{dA}{dt} = 2$

$\frac{d(\pi r^2)}{dt} = 2$

$2\pi r\frac{dr}{dt} = 2$

$\frac{dr}{dt} = \frac{1}{\pi r}$

Also, the change in diameter with respect to time(t),

$\frac{d}{dt} (2 r) = 2 \frac{dr}{dt}$

$\frac{d}{dt} (2 r) = 2 \times \frac{1}{\pi r}$

$\frac{d}{dt} (2 r) = \frac{2}{\pi r}$

For r = 1.5 m,

$\frac{d}{dt} ( 2 r)]_{r=1.5} = \frac{2}{\pi \times 1.5}=\frac{20}{\pi \times 15}=\frac{4\pi }{3}\text{ meter per hour}$

7 0

2 years ago