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fredd [130]
3 years ago
13

You have 30,016 grams of radioactive kind of

Mathematics
1 answer:
Ostrovityanka [42]3 years ago
4 0

Answer:

15,008 grams

Step-by-step explanation:

You have 30,016 grams of radioactive kind of rubidium. How much will be left after 54 minutes if its half-life is 18 minutes? 15,008 grams.

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The odometer readings on a random sample of identicle model sports cars are normally distributed with mean of 120000 miles and a
Nat2105 [25]

Answer:

We are given that random sample of identical model sports cars are normally distributed with mean of 120000 miles and standard deviation of 30000 miles.

\mu=120000, \sigma = 30000

We have to find approximately how many sports cars will have less than 150000 miles on the odometer.

We will first find the z-score for 150000.

z=\frac{x-\mu}{\sigma}

    =\frac{150000-120000}{30000}

    =1

Now using the standard normal table, we have:

P(z

Now there will be approximately 0.8413 \times 6000=5047.8 \approx 5048 sport cars will have less than 150000 miles on the odometer.

6 0
3 years ago
A bag contains x blue chips and y red chips. If the probability of selecting a red chip at random is 3/7, then x/y = ________.A.
LUCKY_DIMON [66]

Answer:

D. \frac{4}{3}

Step-by-step explanation:

We have been given that a bag contains x blue chips and y red chips. The probability of selecting a red chip at random is 3/7. We are asked to find the \frac{x}{y}.

\text{Probability}=\frac{\text{Number of favorable outcomes}}{\text{Total number of possible outcomes}}

P(\text{Red})=\frac{\text{Number of red chips}}{\text{Total number of chips}}

P(\text{Red})=\frac{y}{x+y}

Since we are told that probability of selecting a red chip at random is 3/7, so red balls are 3 and total balls are 7:

P(\text{Red})=\frac{3}{x+3}

Since total balls are 7, so we will get:

x+3=7\\x=4

Upon substituting x=4\text{ and } y=3 in expression \frac{x}{y}, we will get:

\frac{4}{3}

Therefore, the value of \frac{x}{y} is \frac{4}{3} and option D is the correct choice.

7 0
3 years ago
Can 4x+35 be factored? yes or no​
enot [183]

Answer:

no it is not able to be factored

7 0
3 years ago
Read 2 more answers
Multiply. 3√2⋅2√8⋅√3⋅√6 <br><br> explanation would be lit
Delicious77 [7]

When two the same numbers under the square root multiply, they are equal to the value under the square root, for example √2⋅√2 = 2. So then we have:

3√2⋅2√8⋅√3⋅√6 = 3⋅√2⋅2⋅√(2⋅2⋅2)⋅√3⋅√(3⋅2) = 3⋅2⋅√2⋅√2⋅√2⋅√2⋅√2⋅√3⋅√3 = 3⋅2⋅2⋅√2⋅3 = 36⋅√2

or if the bolded 2 from above is also the square root, then the solution is:

3√(2⋅2)√(2⋅2⋅2)⋅√3⋅√(3⋅2) = 54

6 0
3 years ago
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The United Kingdom is one of the leading fishing nations of the world. Which of the following is the best reason why this is tru
Artemon [7]
D the uk is surounded by water :D

7 0
4 years ago
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