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3 years ago

Yooo

Mathematics

1 answer:

Stella [2.4K]3 years ago

8 0

Answer:

The first one is d: x=0 or x=6

the second one is the 3rd one

Step-by-step explanation:

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Im pretty sure the answer is a

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3 years ago

A vendor at a concert is selling hot dogs and hamburgers. Hot dogs cost $3 each

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3 years ago

A calculator is required to obtain the final answer on this question. A solid metal sphere at room temperature 20oC is dropped i

yKpoI14uk [10]

Answer:

T = 47.1875°C

Step-by-step explanation:

Given:

Surrounding temp, Ts = 100°C

Initial Temperature ,T0= 20°C

Increase in temperature = 15°C

Final temperature, T = 20 + 15 = 35°C

Time, t = 9 seconds

Let's take Newton's law of cooling:

$T - Ts = (T_0 - Ts)e^k^t$

We'll solve for k

$35 - 100 = (20 - 100)e^9^k$

$-65 = (-80)e^9^k$

Divide both sides by -5

$13 = (16)e^9^k$

$9k = ln (\frac{13}{16})$

$k = \frac{1}{9} ln (\frac{13}{16})$

$k = -0.02307104053$

Let's now find the temperature of the ball after 18 seconds in boiling water.

Use the Newton's equation again:

$T - Ts = (T_0 - Ts)e^k^t$

$T - 100 = (20 - 100)e^-0.0^2^3^0^7^1^0^4^0^5^3^*^1^8$

$T - 100 = (-80)e^-0.0^2^3^0^7^1^0^4^0^5^3^*^1^8$

$T - 100= -52.8125$

$T = 100 - 52.8125$

T = 47.1875°C

Temperature of the ball after 18 seconds in boiling water is 47.1875°C

5 0

4 years ago

What is this I am so dumb

erastovalidia [21]

Answer:

-6 $\sqrt{13}$

Step-by-step explanation:

This is similar to collecting like terms in Algebra, that is

- 2x - 7x + 3x = x(- 2 - 7 + 3) = - 6x

Similarly

-2 $\sqrt{13}$ - 7 $\sqrt{13}$ + 3 $\sqrt{13}$

= $\sqrt{13}$ (- 2 - 7 + 3) = - 6 $\sqrt{13}$

8 0

3 years ago

Read 2 more answers

<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B6%7D%7B8%7D%20%20%3D%20%20%5Cfrac%7B%3F%7D%7B6%7D%20" id="TexFormula1" title=" \f

Sever21 [200]

Answer:

$\frac{9}{2}$

Step-by-step explanation:

We can reduce fraction on left

6/8 to 3/4.

$\frac{3}{4} = \frac{x}{6}$

We solve for x by multiplying 6.

6 0

3 years ago