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3 years ago

Write 3 numbers that round to 647,400 when rounded to the nearest hundred

Mathematics

1 answer:

vampirchik [111]3 years ago

4 0

1. 647,399 rounds to 647,400

2. 647,398 rounds to 647,400

3. 647,397 rounds to 647,400

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A pan is heated to 409°F, then removed from the heat and allowed to cool in a kitchen where the room temperature is a constant 7

Irina18 [472]

Answer: C. $265.9^{\circ}F$

Step-by-step explanation:

Given: The formula below can be used to find D, the difference in temperature between the pan and the room after t minutes.

$D = 338e^{-0.03t}$

At t= 8 minutes, we get

$D = 338e^{-0.03(8)}\\\\\Rightarrow\ D = 338e^{-0.24}\\\\\Rightarrow\ D = 338(0.786627861067)\\\\\Rightarrow\ D = 265.88\approx265.9^{\circ}F$

The approximate temperature of the pan after it has been away from the heat for 8 minutes= $265.9^{\circ}F$

6 0

3 years ago

A rotating light is located 20 feet from a wall. The light completes one rotation every 3 seconds. Find the rate at which the li

ss7ja [257]

Answer:

43.17 ft/s

Step-by-step explanation:

Let the height of the wall is y.

distance of wall from light is 20 feet.

$tan\theta =\frac{y}{20}$

y = 20 tanθ .... (1)

time period, T = 3 second

$\frac{d\theta}{dt}=\frac{2\pi}{3}$

Differentiate equation (1) with respect to t.

$\frac{dy}{dt}=20sec^{2}\theta\times \frac{d\theta}{dt}$

$\frac{dy}{dt}=20sec^{2}10\times \frac{2\pi}{3}$

dy/dt = 20 x 2.16

dy/dt = 43.17 ft/s

4 0

3 years ago

U equals vw plus z solve for v

padilas [110]

Subtract z from the right side so that it becomes... u - z = vw

Then all you do is divide the right side of the equation(or equals sign) by w because your goal is to get whatever you're solving for by itself.

Your answer, then, is... u-z/w = v

3 0

3 years ago

AleksAgata [21]

Answer: 3 • ? = -6

Reasoning: -6/ 3 = -2
3 • -2 = -6

8 0

2 years ago

Find the midpoint of the line segment joining points A and B.<br> A(2,- 7); B(2,3)

Ad libitum [116K]

Answer: (2, -2)

Step-by-step explanation:

$\left(\frac{2+2}{2}, \frac{3-7}{2} \right)=(2,-2)$

8 0

1 year ago

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