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____ [38]
3 years ago
8

How long must $542 be invested at a rate of 7 percent to earn a 303.52 interest

Mathematics
1 answer:
Marizza181 [45]3 years ago
5 0
How long must $542 be invested at a rate of 7 percent to earn a 303.52 interest

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The half life of radium is 1690 years. if 80 grams are present now, how much will be present in 830 years
Pachacha [2.7K]

Answer:

A(t) = amount remaining in t years

      = A0ekt, where A0 is the initial amount and k is a constant to                     be determined.  

Since A(1690) = (1/2)A0 and A0 = 80,

                we have 40 = 80e1690k

                1/2 = e1690k

                ln(1/2) = 1690k

                k = -0.0004

So, A(t) = 80e-0.0004t

Therefore, A(430) = 80e-0.0004(430)

                           = 80e-0.172

                           ≈ 67.4 g

Step-by-step explanation:

5 0
2 years ago
Laura has $30 to spend on food for the week. Which inequality represents this? x < 30 x < 30 x > 30 x > 30
Llana [10]
X is less than or equal to $30, she can spend $30, she cant spend more, she can spend less.

The answer should look like X<30 with a line under the less than sign, i hope this helps.
7 0
4 years ago
I need help with these please... anyone?
Svetlanka [38]
The total measure of the interior angles of each figure will be:

180 (n-2) = 180 (4 - 2) = 360

Now add all those angles and set them equal to 360.

41 + 133 + 86 + x = 360

x is the unknown angle.

260 + x = 360
x = 100

The missing angle that is Not labeled in any of the figure is 100°

Hope this helps :)
8 0
3 years ago
Find the exact arc length of the given arc. show all work and leave terms of pi and reduce your fraction.
Sauron [17]

Answer:

20/3pi

Step-by-step explanation:

\frac{75}{360}  \times 2\pi \times 16 \\  =  \frac{2400}{360} \pi\\  =  \frac{20}{3}   \pi\\  = 20.94 \: cm

Please give brainliest if it helps

5 0
3 years ago
Find the distance between the points (-3, 11) and (5,5).<br> O 10<br> 2/10<br> o 2.17
german

Answer: d = 10

Step-by-step explanation:

Step-by-step explanation:

The formula for calculating distance between two points is given by :

d = \sqrt{(x_{2}-x_{1})^{2}+(y_{2}-y_{1})^{2}}

x_{1} = -3

x_{2} = 5

y_{1} = 11

y_{2} = 5

substituting the values , we have

d = \sqrt{(5-(-3))^{2}+(5-11)^{2}}

d = \sqrt{(5+3)^{2}+(-6)^{2}}

d = \sqrt{(8)^{2}+(-6)^{2}}

d = \sqrt{64+36}

d = \sqrt{100}

d = 10

4 0
3 years ago
Read 2 more answers
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