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Ainat [17]
3 years ago
12

a rare isotope of a nuclear material is very unstable, decaying at a rate of 14% each second. Find how much isotope remains 13 s

econds after 7 grams of the isotope is created. The mass of the remaining isotope is approximately _ g
Mathematics
1 answer:
Anna35 [415]3 years ago
8 0
I think you divide 14 by 7
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The question <br> Najheheggebbsbv nhsygenbs
dezoksy [38]

Answer: 1.) √121= 11

Step-by-step explanation:

11•11=121

4 0
3 years ago
When a plane intersects a sphere, what two-dimensional shape describes the cross-section? ​
trasher [3.6K]

Answer:

A Circle

Step-by-step explanation:

4 0
2 years ago
In 14 days the daily high temperature in cedar hills dropped by 16.8 degrees Fahrenheit what is the average daily rate of change
Montano1993 [528]

Answer:

1.2°F

Step-by-step explanation:

Given that:

The drop in temperature in degree Fahrenheit over a period of 14 days = 16.8

The average daily rate of change in degwrr Fahrenheit ;

Total drop in temperature / number of days

= 16.8°F / 14

= 1.2°F

Hence, the average daily drop in temperature is 1.2°F

6 0
2 years ago
measurement error that is continuous and uniformly distributed from millivolts is added to the true voltage of a circuit. then t
satela [25.4K]

Question has missing details (Full question below)

Measurement error that is continuous and uniformly distributed from –3 to +3 millivolts is added to a circuit’s true voltage. Then the measurement is rounded to the nearest millivolt so that it becomes discrete. Suppose that the true voltage is 219 millivolts. What is the mean and variance of the measured voltage

Answer:

Mean = 219

Variance = 4

Step-by-step explanation:

Given

Let X be a random variable measurement error.

X has a discrete uniform distribution as follows

a = 219 - 3 = 216

b = 219 + 3 = 222

Mean or Expected value is calculated as follows;

E(x) = ½(216+222)

E(x) = ½ * 438

E(x) = 219

Variance is calculated as follows;

Var(x) = ((b-a+1)²-1)/12

Var(x) = ((222-216+1)²-1)/12

Var(x) = (7²-1)/12

Var(x) = 48/12

Var(x) = 4

8 0
3 years ago
There is a bag filled with 4 blue and 5 red marbles. A marble is taken at random from the bag, the colour is noted and then it i
Vera_Pavlovna [14]

Answer:

2/9?

Explanation:

4+5=9

5>4

2x chance

8 0
3 years ago
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