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s344n2d4d5 [400]
3 years ago
13

the half-time life of strontium-85 is 64.84 days. how much of a 40 mg sample would be left after 180 days​

Mathematics
1 answer:
Fynjy0 [20]3 years ago
7 0

Answer:

  about 5.84 mg

Step-by-step explanation:

The amount remaining after t days can be written as ...

  remaining = initialAmount · (1/2)^(t/(halfLife))

Filling in the given numbers, you have

  remaining = (40 mg)·(1/2)^(180/64.84) ≈ 5.84 mg

About 5.84 mg would be left after 180 days.

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Evaluate 7m+2n-8p/n for m = -4, n = 2, and p = 1.5
Zanzabum
7*-4= -28 +4-12/2
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Dave has 10 poker chips, 5 of which are red and the other 5 of which are white. Dave likes to stack his chips and flip them over
sergey [27]

Answer:

\frac{10!}{5!*5!}  -  \frac{5!}{3!*2!}  

Step-by-step explanation:

Given:

10 poker chips:

  • 5 red
  • 5 white

Let the stack has positions (1,2,3,4,5,6,7,8,9,10)

So we can find all possible outcomes of the stack is: \frac{10!}{5!*5!} =

and the possibility of a stack to be identical while flipping is: \frac{5!}{3!*2!}

So the different 10-chip stacks can Dave make if two stacks are not considered distinct:

\frac{10!}{5!*5!}  - \frac{5!}{3!*2!}  

7 0
3 years ago
Read 2 more answers
I have no idea what the answer is lol
nikdorinn [45]

Answer:

A. y = \frac{2}{5}x -2

Step-by-step explanation:

The y-intercept starts at -2

The slope is \frac{2}{5} because it goes up 2 and 5 to the right.

The equation would be y = \frac{2}{5}x -2

8 0
3 years ago
A brownie recipe calls for 1 cup of sugar and a cup of flour to make one batch of brownies. To make multiple batches, the equati
marysya [2.9K]

Answer:

I cant see ths graph but look for one with a positive relationship between flour and sugar meaning that if flour is on one axis sugar should be on the other they should both go up by one every time

Step-by-step explanation:

The graph should say for example at 3 cups of flour that their is 3 cups of sugar. It should look upwards in growth and use whole positive numbers.

3 0
3 years ago
(PLEASE HELP) Question is worth 30 points:) The following function represents the production cost F(x) In dollars for x numbers
soldi70 [24.7K]

Answer:

production cost f(x), in dollars, for x number of units produced by company 1:

f(x) = 0.05x^2 − 7x + 300

2) Table that represents the production cost g(x), in dollars, for x number of units produced by company 2:

x        g(x)

0.6     899.58

0.8     899.52

1        899.50

1.2     899.52

1.4     899.58

3) Comparison: do a table for f(x) with the same x-values of the table for g(x).

x            f(x) = 0.05x^2 − 7x + 300    g(x)

0.6         295.818                               899.58

0.8         294.432                               899.52

1            293.05                                 899.50

1.2         291.672                               899.52

1.4          290.298                              899.58

As you can see the values of f(x) are consistently lower than the values of g(x) for the same x-values.

The minimum production cost for company 2 is around 899.50 at x = 1, while the minimum production cost of company 1 is defintely lower (lower than 292.298 for sure, in fact if you find the vertex it is 55).

Answer: Based on the given information, the minimum production cost for company 2 is greater.

Step-by-step explanation:

5 0
3 years ago
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