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Rasek [7]
3 years ago
14

a scientist has 350 mg of radioactive material. the material is cut in half every 2 hours. how much will be left after 10 hours?

Mathematics
2 answers:
marin [14]3 years ago
4 0
If you cut it in half every two hours, the answer will be 10.9375 mg. 
Rudiy273 years ago
4 0
Idk I just need points ;D
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The ratio of men to women in New York is 3:4. What is the fraction of men in NYC? A.  3/4 B.  1/4 C.  1/3 D.  3/7 
Bad White [126]
The question is not clear: the fraction of men to everyone in NYC will be 3/7
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What is the next term of the geometric sequence?<br> 40/27, 20/9, 10/3
ss7ja [257]

Answer:

Step-by-step explanation:

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The ratio of girls to boys in a chess club was 5:4. there were 32 boys. how many girls were their
algol [13]
\frac{girls}{boys} =  \frac{5}{4} =  \frac{x}{32} &#10;

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7 0
3 years ago
!!!HELPPP PLEASEEE!!! For this problem I thought it meant to subtract 0.1492 - 0.1515 = -0.0023 however my answer was incorrect.
Oduvanchick [21]

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5 0
2 years ago
PLEASE HELP!<br>Calculate $40^{13} \pmod{85}.$
SVEN [57.7K]
In this type of calculations, we decompose 13 by checking the lowest powers of the base, that is 40. for example we check 40^2, or 40^3 and compare it to 85

Notice

40*40*40=64,000

so we check how many time does 85 fit into 64,000:

64,000/85=752.94

85*753=64,005;       64000-64,005=-5

this means that 

40^{3} =-5\pmod{85}

thus

40^{13} =40^{3*4+1}={(40^{3})}^{4}*40=(-5)^{4}*40 \pmod{85}=\\\\625*40\pmod{85}=(7*85+30)*40\pmod{85}=30*40\pmod{85}\\\\=1200\pmod{85}=(14*85+10)\pmod{85}=10\pmod{85}


Answer: 10 (mod85)

Remark, the set of all solutions is:

{......-75, 10, 95, .....}, that is 85k +10
7 0
3 years ago
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