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3 years ago

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Autumn starts with 1 milligram of a radioactive substance. The amount of the substance decreases by 50% each week for a number o

f weeks, w. She writes the expression (1−0.5)w to find the amount of radioactive substance remaining after w weeks.

1 answer:

krok68 [10]3 years ago

3 0

Answer:

Andrea's Expression: (1 - 0.2)^w

w: number of weeks

0.2: percent decrease

1 - 0.2: decay factor for each week

I got Eric's Expression wrong :(

Click to let others know, how helpful is itAndrea's Expression: (1 - 0.2)^w

w: number of weeks

0.2: percent decrease

1 - 0.2: decay factor for each week

I got Eric's Expression wrong :(

Click to let others know, how helpful is itAndrea's Expression: (1 - 0.2)^w

w: number of weeks

0.2: percent decrease

1 - 0.2: decay factor for each week

I got Eric's Expression wrong :(

Click to let others know, how helpful is itAndrea's Expression: (1 - 0.2)^w

w: number of weeks

0.2: percent decrease

1 - 0.2: decay factor for each week

I got Eric's Expression wrong :(

Click to let others know, how helpful is it

Step-by-step explanation:

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konstantin123 [22]

Answer:

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Step-by-step explanation:

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3 years ago

−1 + 6 = 5 + 8 + 4<br> Group of answer choices

Stella [2.4K]

Step-by-step explanation:

your answer is 22.

if you have -1 + 6 = 5 theres your first answer 5

5 + 8 is equal to 13

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3 years ago

Calculate the number of subsets and the number of proper subsets for the set.

arlik [135]

A set of n elements has 2ⁿ subsets. One of these subsets is the set itself, so this set would have 2ⁿ - 1 <em>proper</em> subsets.

The given set has 4 elements, so it has 2⁴ = 16 subsets and 2⁴ - 1 = 15 proper subsets.

Just to illustrate the claim, we have

• subsets of size 0 (1 of these):

{ } (empty set)

• subsets of size 1 (4 of these):

{1/6}, {1/7}, {1/8}, {1/9}

• subsets of size 2 (6 of these):

{1/6, 1/7}, {1/6, 1/8}, {1/6, 1/9}, {1/7, 1/8}, {1/7, 1/9}, {1/8, 1/9}

• subsets of size 3 (4 of these):

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• subsets of size 4 (1 of these):

{1/6, 1/7, 1/8, 1/9}

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2 years ago

I am struggling with these questions. Please help

Sauron [17]

Answer: Just apply the formula

Step-by-step explanation:

The equation for volume of a cone is:

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The radius is the line that creates a 90 degree angle with the height

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I recommend leaving Pi as it is and plugging the rest of the numbers first.

Then at the end multiply by 3.14 and round at the end.

This way, it is easier to avoid calculation errors.

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3 years ago

How to write 2/10 as a fraction with a denominator of 100?

mrs_skeptik [129]

Answer To change a fraction into an equivalent fraction with a denominator of 100: 1. establish how many times the given denominator fits (divides) into 100 2. multiply both the numerator and the denominator by that number. Remember that factor pairs of 100 could be of assistance.

Step-by-step explanation:

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2 years ago

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