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Margaret [11]
2 years ago
7

How much of a radioactive kind of promethium will be left after 20 days if you start with

Mathematics
1 answer:
Gwar [14]2 years ago
8 0

in 20 days 4 half life will be completed

so n = 4

formula :-

\frac{ A\degree}{ {2}^{n} }  =  \frac{9056}{ {2}^{4} }  =  \frac{9056}{16}  = 566grams

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Howdy!
posledela

Answer:

A) Central angle has same measure as intercepted arc.

  • mCE = mCD + mDE = 20° + 90° = 110°

B) Opposite angles of cyclic quadrilateral are supplementary.

  • mRL = 2*m∠PQR - mPL = 2*74° - 72° = 76°
  • m∠QPL = (1/2)mQRL = (1/2)(90° + 76°) = 83°
  • m∠QRL = 180° - m∠QPL = 180° - 83° = 97°
  • mQP = 360° - (90° + 76° + 72°) = 122°

C)

  • m∠MLN = m∠MRN as same arc MN is intercepted
  • m∠LMN is right angle as opposite side is diameter.
  • ∠MNL is complementary with ∠MLN which is same as ∠MRN
  • m∠MNL = 90° - 47° = 43°

D) Tangent secant angle is half of the intercepted arc.

<em>It seems wrong. Should be mQP instead of mQR</em>

  • mQP = 2*m∠RQP = 2*74° = 148°
8 0
3 years ago
Enrique has to pay 80% of a $200 phone bill. Explain how to use equivalent ratios to find 80% of $200.
alisha [4.7K]

Answer: $160

Step-by-step explanation:

80%is the same thing as \frac{80}{100}

Also , since we are using equivalent ratio , we will look for a way to write 200 in order to have equivalent of 100. That is 200 is the same as 100 x 2

Therefore : 80% of a 200 is the same

\frac{80}{100} x 100 x 2

which is the same as 80 x 2

$160

5 0
4 years ago
Read 2 more answers
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AlladinOne [14]
Can you help me no one is helping me
6 0
4 years ago
What is the square root of 36​
earnstyle [38]

Answer:

6

Step-by-step explanation:

6 0
3 years ago
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six flags charges a fee to enter the amusement park and then $2 per ride that you go on. If the total cost is $39 when you ride
Mars2501 [29]
Uh would it be 7 x 2 + x = 39 Im not that good at math but I think thats its
4 0
4 years ago
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