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Lina20 [59]
3 years ago
14

What is the surface area of a sphere with a diameter of 6 ft

Mathematics
1 answer:
Aleksandr-060686 [28]3 years ago
7 0

Answer: 113.1ft²

Step-by-step explanation:

The answer is 113.1ft²

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-8 + 2x = 3x – 12 What is it?​
lorasvet [3.4K]

Answer:

x=4

Step-by-step explanation:

-8+2x= 3x-12

-x=-4

x=4

7 0
3 years ago
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You have 480 grams of a radioactive kind of samarium. If its half-life is 90 years,
lisov135 [29]

Answer:

120 grams will be left after 180 years.

Step-by-step explanation:

A radioactive half-life refers to the amount of time it takes for half of the original isotope to decay and its given by

                                             N(t)=N_0(\frac{1}{2})^\frac{t}{t_{1/2}}

where,

N(t) = quantity of the substance remaining

N_0 = initial quantity of the substance

t = time elapsed

t_{1/2} = half life of the substance

From the information given we know that:

  • The initial quantity is 480 g,
  • The half-life is 90 years,
  • 180 years is the time elapsed.

And we want to find how much will be left. For this we use the above formula.

N(t)=480\left(\frac{1}{2}\right)^{\frac{180}{90}}\\\\N(t)=480\left(\frac{1}{2}\right)^2\\\\N(t)=480\cdot \frac{1}{2^2}=120

120 grams will be left after 180 years.

3 0
3 years ago
Solve the inequality for x. <br> 3<br> 2<br> x + 2 &gt; 32
Elden [556K]

Answer:

x > 30

Step-by-step explanation:

x + 2 > 32

Subtract 2 from each side

x + 2-2 > 32-2

x > 30

4 0
3 years ago
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Ryan has a $500 bond with a 6.5% coupon. How much interest will Ryan
oee [108]
D. Is the correct answer
3 0
3 years ago
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Which pairs of rectangles are similar polygons?<br> Select each correct answer.
iragen [17]

Answer:

The bottom two

Step-by-step explanation:

[] Similar beings their sides have equivalent ratios to each other

[] See attached

Have a nice day!

     I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

8 0
2 years ago
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