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masya89 [10]
2 years ago
15

What is the number in standard form? 4.9×108

Mathematics
2 answers:
Romashka-Z-Leto [24]2 years ago
7 0

Hi i just took this test and the answer is

490,000,000

Hoped i Helped Out.

raketka [301]2 years ago
5 0
The standard form for 4.9x10^8 is 490,000,000.  You can obtain his number by taking 4.9 and moving the decimal 8 spaces to the right since the 10^8 has a positive 8 number.  If the 8 was a negative number, then you would move the decimal 8 spaces to the left.
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3 years ago
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A spotlight on the ground shines on a wall 12 m away. If a man 2 m tall walks along the x-axis from the spotlight toward the bui
tester [92]

Answer:

(dy/dt) = - 0.45 m/s (the minus sign indicates that the height of the shadow decreases as the man moves towards the wall).

Step-by-step explanation:

An image of the problem is presented in the attached file to this solution. The image shows the exact moment when the 2m tall man is 4m away from the wall.

First of, when the man is 4m away from the wall, he is 8m away from the spotlight, that is, x = 8m

Using the concept of similar triangles, we can obtain the value of y at this point.

(x/2) = [(x+4)/y]

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(8/2) = (12/y)

y = 3m when x = 8m

From the image,

But generally, for x and y at any point,

(x/2) = (12/y)

xy = 24

Differentiating with respect to t

(d/dt)(xy) = (d/dt)12

y (dx/dt) + x (dy/dt) = 0

x (dy/dt) = - y (dx/dt)

At x = 8m, y = 3m, (dx/dt) = 1.2 m/s

8 (dy/dt) = - 3 (1.2)

(dy/dt) = - 3.6/8 = - 0.45 m/s

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7 0
3 years ago
Francis deposits $11,000 in an IRA. What will be the value of his investment in 9 years if the investment is earning 4.1% per ye
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Answer:

$15,059

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2 years ago
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Answer:

Step-by-step explanation:

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So 5
then 5 times 5
then 5 times 5 times 5
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A: 4 rounds so 5^4=625 photos
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A:4
B:7
C:9

4 0
2 years ago
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