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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 cost of running an appliance varies jointly as the number of watts used, the hours of operation, and the cost per kilo-watt
zhuklara [117]
Suppose:
C=cost
c=cost per kilo-watt hour
w=number of watts
h=number of hours
thus
C=kwhc
where:
k=constant of proportionality:
k=C/(whc)
but
C=15 when w=6000, h=10/60=1/6 hours, c=7.5 cents per kw/h
thus
k=15/(6000*1/6*7.5)
k=0.002
thus:
C=0.002(whc)
hence:
when 
h=70*2=140=140/6=70/3 hours the cost will be:
C=0.002(6000*70/3*7.5)
C=2100 cents
C=$21

7 0
3 years ago
a law firm charges $100 per hour plus a $300 origination fee for its services find a function notation
Kisachek [45]
F(t)= $100 x h + 300 A reasonable domain is (1,2,3) and the range is ($400,$500,$600)
5 0
3 years ago
A university dean is interested in determining the proportion of students who receive some sort of financial aid. Rather than ex
Roman55 [17]

Answer:

 Standard error (S.E) =  0.048  ≅ 0.05

Step-by-step explanation:

<u>Explanation</u>:-

Given  sample size 'n'=76

Given the dean who randomly selects 76 students and finds that 58 out of 76 are receiving financial aid.

Sample proportion

                         p = \frac{x}{n} = \frac{58}{76} = 0.7631

The standard error is determined by

                     S.E = \sqrt{\frac{p(1-p)}{n} }

                     S.E = \sqrt{\frac{0.763(0.2369}{76} }

  Standard error is 0.048  ≅ 0.05

3 0
3 years ago
Ms. Cathy bought a package of pencils. Out of every 10 pencils, 5 are black. If there are 20 pencils in the pack, what fraction
Advocard [28]

Answer:

there are 10 black pensoles

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
^
slega [8]

Answer:

a

Step-by-step explanation:

go it right on a mastery test

4 0
1 year ago
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