1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Snowcat [4.5K]
3 years ago
6

Bismuth-212 has a half-life of 60.5 minutes. Find the amount of bismuth-212 left from a 100-gram sample after 242 minutes

Mathematics
1 answer:
amid [387]3 years ago
5 0

Notice that 242 = 4*60.5. This means after 242 minutes, the sample decays to \dfrac1{2^4}=\dfrac1{16} of its original amount. So you end up with

\dfrac{100\,\mathrm g}{16}=\boxed{6.25\,\mathrm g}

You might be interested in
Write the given logarithmic equation in exponential form.<br><br> In 4x = 9.6
KengaRu [80]
90% of people marry there 7th grade love. since u have read this, u will be told good news tonight. if u don't pass this on nine comments your worst week starts now this isn't fake. apparently if u copy and paste this on ten comments in the next ten minutes you will have the best day of your life tomorrow. you will either get kissed or asked out in the next 53 minutes someone will say i love you
7 0
3 years ago
A coat at a store is originally priced at $54.99. The store marks the price down to $32.99. To the nearest percent, what is the
Dmitry_Shevchenko [17]

Answer:

66.6%

Step-by-step explanation:

Step one

given

A coat at a store is originally priced at $54.99

The store marks down the price down to $32.99

Required

the percent decrease

Step two:

the percent decrease= change in price/ old price*100

the percent decrease= 54.99-32.99/54.99*100

the percent decrease= 22/ 32.99*100

the percent decrease= 0.666*100

the percent decrease= 66.6%

6 0
3 years ago
Solve by substitution y=2x-1 y=3x+1
kupik [55]
Answer: x = -2

Step-by-Step Explanation:

Since the two expressions both equal y, you can set them equal to each other.

2x-1 = 3x+1

Subtract 2x from both sides.

-1 = x+1

Subtract 1 from both sides.

-2 = x

3 0
3 years ago
Item 16 An indoor water park has two giant buckets that slowly fill with 1000 gallons of water before dumping it on the people b
nignag [31]

Answer:

  • 3:16 P.M.
  • 5:22 P.M.

Step-by-step explanation:

The two dump intervals have a greatest common factor (GCF) of 3, so their least common multiple (LCM) is ...

  (18)(21)/3 = 126 . . . . minutes

This period is 2 hours 6 minutes. The last time both dumped was 1:10, so the next time both will dump is ...

  1:10 +2:06 = 3:16 . . . P.M.

and the next time after that is ...

  3:16 +2:06 = 5:22 . . . P.M.

4 0
3 years ago
Mandy wants her decking for barbeques to at least fit 6 people. her scale is 2 centimeters for every 1 meter. how big would her
Sladkaya [172]
How many meters fit in 1 person?!
6 0
3 years ago
Other questions:
  • Alina has just recieved 3 video games for her birthday to add to her existing 12 video games. A week later she went to the thrif
    5·1 answer
  • Glacier State Bank pays 6% interest, compounded daily. After finding the daily interest rate (to the nearest millionths place) f
    12·1 answer
  • Regular hexagon ABCDEF rotates 240° counterclockwise about its center to produce hexagon A'B'C'D'E'F'. Which points will A' and
    10·1 answer
  • Can someone pls help me -n-
    11·2 answers
  • The measures of two complementary angles are described by the expression(13y+12) and (20y+12). Find the measures of angles​
    15·1 answer
  • Ratios and proportions quick quiz. Jules bought 6 pairs of shorts for 30$ at this rate what would the cost be for 8 pairs of sho
    14·1 answer
  • Help pls 70 points :’(
    15·2 answers
  • What's the value of x when f(x)=58
    9·1 answer
  • 1) In statistics, the average is also
    7·2 answers
  • Vassil rounded to the nearest half to estimate the product of Five-eighths and StartFraction 8 over 9 EndFraction. How do the es
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!