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Doss [256]
2 years ago
13

After t days, the mass m, in grams, of 100 grams of a certain radioactive element is given by the function f(x) = 1000 (0.97)^t.

To the nearest percent, what is the WEEKLY decay rate of the element?
Mathematics
2 answers:
Radda [10]2 years ago
5 0

Answer:

19 %

it was write answer

please mark me brainlist

tia_tia [17]2 years ago
3 0

Answer:

19%

Step-by-step explanation:

??i think I'm not sure

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Solve for x. <br>0.71= 1/2(9.8) x^2. ​
Fudgin [204]

Answer: 0.38065

in simpler terms x=±  0.145  =±0.38065

Step-by-step explanation: -490x2+71 = 0  

Subtract  71  from both sides of the equation :  

                     -490x2 = -71

Multiply both sides of the equation by (-1) :  490x2 = 71

Divide both sides of the equation by 490:

                    x2 = 71/490 = 0.145

 

When two things are equal, their square roots are equal. Taking the square root of the two sides of the equation we get:  

                     x  =  ± √ 71/490  

The equation has two real solutions  

These solutions are  x = ±√ 0.145 = ± 0.38065  

5 0
2 years ago
A trapezoid has bases with lengths of 1.5 yards and 4 yards. The height is 12 yards. What is the area of the trapezoid?
Georgia [21]
Answer: 33 square yards

Explanation: To solve this, we must first add both bases together, 1.5 and 4.

1.5 + 4 = 5.5

Next, we must multiply 5.5 and 12

12 x 5.5 = 66

The last step is to divide our product by 2, similar what we do to triangles.

66/2 = 33
—————————————————————

Hope this helps!!
4 0
2 years ago
0=-6t+69 help I don’t understand
elixir [45]

Answer:

-3 (2t - 23)

Step-by-step explanation:

3 0
3 years ago
a pet store donated 50 pounds of food for adult dogs , puppies and cats to an animal shelter. 19 and 3/4 pounds was adult dog fo
ddd [48]

Answer: 10 3/8

Step-by-step explanation:

= 50 - 19 3/4 - 19 7/8

= 10 3/8

5 0
2 years ago
Julio is drawing tiles from a bag of tiles like the one shown below. He draws a tile, replaces it, and draws another tile. What
givi [52]

Answer:

The answer is 16/225.

D.) 16/225.

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
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