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Darya [45]
3 years ago
7

The number of cups of flour varies directly as the number of rolls made. Four cups of flour are needed to make 24 rolls. How muc

h flour is needed for 36 rolls?
a 3
b 4
c 6
d 8
Mathematics
2 answers:
Hoochie [10]3 years ago
5 0
The correct answer is D.8
lana66690 [7]3 years ago
4 0
The correct answer is 8
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The half life of silicone-32 is 710 years. If 30 grams is present now, how much will be present in 300 years?
Irina18 [472]

Answer:

22.38 g of silicone-32 will be present in 300 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:

  • The initial quantity of silicone-32 is 30 g.
  • The time elapsed is 300 years.
  • The half life of silicone-32 is 710 years.

So, to find the quantity of silicone-32 remaining we apply the above equation

N(t)=30\left(\frac{1}{2}\right)^{\frac{300}{710}}=30\left(\frac{1}{2}\right)^{\frac{30}{71}}\approx22.38 \:g

22.38 g of silicone-32 will be present in 300 years.

7 0
3 years ago
Plssss help i’m timed 6th grade math
WINSTONCH [101]

Answer:

D

Step-by-step explanation:

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BRO PLEASE HELP ASAP
KiRa [710]

Answer:

bro i think its 10

Step-by-step explanation:

3 0
3 years ago
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