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Katarina [22]
3 years ago
7

Round 1,497 to the nearest ten

Mathematics
1 answer:
Eddi Din [679]3 years ago
4 0
0-4 stay the same 5-9 plus one
Which is 1,500
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X⁴+5x²-6=0 solve for x
Snowcat [4.5K]
Let u = x², then we would have u² + 5u - 6 = 0

From here, we can factor it and get us (u-1)(u+6) = 0

So our solution for u is u = -6 or 1.

Now substitute u back to x².

x² = -6 or 1

x = ±√(-6) or ±√1

Since ±√(-6) is not real number, we ignore it.

Which leave us x = ±√1 = <span>±1

So our real solution is x = -1 or 1.</span>
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What is the area of this quadrilateral?<br> 2 ft<br> 3 ft<br> 8 ft 8 ft<br> 3 ft<br> 2 ft
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1 year ago
You have 42,784 grams of a radioactive kind of curium. If its half-life is 18 years, how much will be left after 72 years?
s344n2d4d5 [400]

Answer:

2,674.14 g

Step-by-step explanation:

Recall that the formula for radioactive decay is

N = N₀ e^(-λt)

where,

N is the amount left at time t

N₀ is the initial amount when t=0, (given as 42,784 g)

λ = coefficient of radioactive decay

  = 0.693 ÷ Half Life

  = 0.693 ÷ 18

  = 0.0385

t = time elapsed (given as 72 years)

e = exponential constant ( approx 2.7183)

If we substitute these into our equation:

N = N₀ e^(-λt)

= (42,787) (2.7183)^[(-0.0385)(72)]

= (42,787) (2.7183)^(-2.7726)

=  (42,787) (0.0625)

= 2,674.14 g

6 0
3 years ago
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Thepotemich [5.8K]
Simply simplify:

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Hope that helps!
3 0
3 years ago
Please solve and find CE​
mixas84 [53]

Answer:

i cant see the picture

Step-by-step explanation:

7 0
3 years ago
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