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zysi [14]
3 years ago
8

You have 896 grams of a radioactive

Mathematics
2 answers:
Margarita [4]3 years ago
7 0

Every 56 seconds, the radioactive substance is divided in half.

224 / 56 = 4

We need to cut the substance in half 4 times.

896 / 2 = 448

448 / 2 = 224

224 / 2 = 112

112 / 2 = 56

After 224 seconds, there will be 56 grams of the radioactive substance left over

lisov135 [29]3 years ago
6 0

Answer:

56 grams

Step-by-step explanation:

To get how much a HALF-life is, divide the amount by two getting one half of the original amount. That represents on half-life. so 224= 56 x 4

remember the half-life is fifty-six, so there would be 4 half-lives within 224 seconds. Divide 896 by 2 (448) then again divide by 2 (224) divide by 2 again (112) and again divide by 2 and you would get 56 grams.

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pishuonlain [190]

Answer: 2x + 5y = -5

Step-by-step explanation:

Two lines are said to be parallel if they have the same slope.

The equation of the line given :

2x + 5y = 10

To find the slope , we will write it in the form y = mx + c , where m is the slope and c is the y - intercept.

2x + 5y = 10

5y = -2x + 10

y = -2/5x + 10/5

y = -2/5x + 2

This means that the slope is -2/5 ,the line that is parallel to this line will also have a slope of -2/5.

using the formula:

y-y_{1} = m (x-x_{1} ) to find the equation of the line , we have

y - 1 = -2/5(x -{-5})

y - 1 = -2/5 ( x + 5 )

5y - 5 = -2 ( x + 5 )

5y - 5 = -2x - 10

5y + 2x = -10 + 5

therefore :

2x + 5y = -5 is the equation of the line that is parallel to 2x + 5y = 10

8 0
2 years ago
Read 2 more answers
6<br> Answer the following questions about this figure.<br> If mZ1= 53°, what is mZ3?
Scrat [10]

Answer:

143 degrees

Step-by-step explanation:

Triangle EDF is a right triangle and we know that angle 1 is equal to 53 degrees. So, angle 2 is equal to 180-90-53 = 37 degrees. Now that we want to find angle 3, we subtract the measure of angle 2 (which is 37) from 180. That gives us 143 degrees.

5 0
2 years ago
A cyclist travels 3 miles in 15 minutes and then a further 7 miles in 25 minutes without stopping.
Feliz [49]

Answer:

15 mph

Step-by-step explanation

i used a calculator but correct me if im wrong pls

3 0
2 years ago
Omar is collecting toy cars. He starts his collection with 2 toy cars that his grandmother gave him. He plans to buy cars each w
d1i1m1o1n [39]

Can you please add the table so i can answer it

4 0
2 years ago
This is an isosceles trapezoid.
Ad libitum [116K]

Answer:

105°

Step-by-step explanation:

X and 75 has to add up to 180

so 180 - 75 = 105°

3 0
2 years ago
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