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arlik [135]
3 years ago
11

It's generally known that it takes 8 minutes for light to get from the Sun to the Earth. If the speed of light is 3.0 X 10^8 m/s

and the distance from the Sun to the Earth is 9.3 X 10^7 miles, is this a true statement?
Mathematics
1 answer:
harina [27]3 years ago
6 0

Answer:

  yes

Step-by-step explanation:

The time required at the given speed and distance is ...

  time = distance/speed

  time = (9.3×10^7 mi)(1.6×10^3 m/mi)/(3.0×10^8 m/s) ≈ 4.96×10^2 s

This time corresponds to 8 minutes and 16 seconds. To an accuracy of 1 significant digit, the statement is true.

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36:38<br> Write the ratio as a fraction in simplest form.
Taya2010 [7]

Answer:

it will 8:9 hope it helps

7 0
3 years ago
a manufacturer has determined that if his company sells x items per day then their profit is given by P=-x^2+ 700 x-10000 euros.
Radda [10]

Answer:

15

Step-by-step explanation:

To find the minimum amount of items, x, that need to be sold for the manufacturer to make a profit, we can use the quadratic formula

x = \frac{-b+\sqrt{b^{2}-4ac } }{2a}; x=  \frac{-b-\sqrt{b^{2}-4ac } }{2a}

x= \frac{-700+\sqrt{700^{2}-4(a)(-10000) } }{2(1)}; x= \frac{-700-\sqrt{700^{2}-4(a)(-10000) } }{2(1)}

x= \frac{-700+\sqrt{530000} }{2}; x= \frac{-700-\sqrt{530000} }{2}

x=\frac{-700+100\sqrt{53} }{2}; x=\frac{-700-100\sqrt{53} }{2};

x=-350 + 50\sqrt53 = 14.005; x = -350 - 50\sqrt53 = -714.005

In context of the problem, we can only rely on the positive value, as the negative value would lead to a loss of profit.

(-714.005)^2+700(-714.005)-10000=-0.360

Furthermore, we must round to the nearest whole number, as you cannot make part of an item.

Lastly, if you were to plug in 14 into the equation for Profit, you would still have a negative number (i.e. a negative profit), thus requiring the manufacturer to make no less than 15 items to make a profit:

(14)^2+700(14)-10000=-4\\\\(15)^2+700(15)-10000=725

3 0
2 years ago
April had
Bumek [7]
First thing First. You must find have a common denominator. If you want to find it then you do this

3: 3 6 9 12 15 18 21
7: 7 14 21 28

Once you found a number they have in common (21) You do this next

3/7 * 3/3 = 9/21
2/3 * 7/7 = 14/21

Now the next thing you do is subtract your numerators but not the denominators

14-9=5

5/12

you cant simplified so your done! Hope this helps!!!!  <span />
3 0
3 years ago
Bart ran 5000 from the cop and an average speed of 6 meters/ seconds before he got caught. how long did he run?
Masja [62]

Answer:

13.8 minutes

Step-by-step explanation:

5000/6= 833/60

3 0
3 years ago
The expression 3x^3-5x^2+3x-1 has ___ terms and a constant of ____.
Andrews [41]
<span>The expression 3x^3-5x^2+3x-1 has ___ terms and a constant of ____.
have four terms and 1 constant
</span>
5 0
3 years ago
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