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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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What expression is equal to 6×8?<br> A. 8×6<br><br> B. 14×1<br><br> C. 6×4×8<br><br> D. 4+2×7+1

iogann1982 [59]

Well, you need to see which is equal to 6*8
6*8 = 48

14*1 = 14
6*4*8 = 192
(4+2)*(7+1) = 48

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3 years ago

Eden just bought a trough in the shape of a rectangular prism for her horses. She needs to know what volume of water to add to t

notsponge [240]

The volume of the trough is V(w) = w³ + 20w² - 429w and the rate of change of the volume over a width of 38 inches to 53 inches is 4695 in³/in

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more variables and numbers.

Let w represent the width, hence:

length = w + 33, height = w - 13

Volume (V) = w(w + 33)(w - 13) = w³ + 20w² - 429w

V(w) = w³ + 20w² - 429w

Rate of change = dV/dw = 3w² + 40w - 429

When w = 38, dV/dw = 3(38)² + 40(38) - 429 = 5423

When w = 53, dV/dw = 3(53)² + 40(53) - 429 = 10118

Rate = 10118 - 5423 = 4695 in³/in

The volume of the trough is V(w) = w³ + 20w² - 429w and the rate of change of the volume over a width of 38 inches to 53 inches is 4695 in³/in

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2 years ago

A number cube is rolled and a coin is flipped.

Mademuasel [1]

Answer:

30

Step-by-step explanation:

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3 years ago

HURRYY!!! Identify the zeros of f(x) = (x − 3)(x + 9)(4x − 3).

tiny-mole [99]

Answer:

The value of x is -9, 3/4 and 3.

Step-by-step explanation:

In order to find the value of x, tou have to let f(x) equals to 0 :

Let f(x) = 0,

(x-3)(x+9)(4x-3) = 0

x - 3 = 0

x = 3

x + 9 = 0

x = -9

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3 years ago

Triangle A C B is cut by bisector C D. The lengths of sides A C and C B are congruent.

navik [9.2K]

The statements that are true are AD = BD , m∠ACD = m∠BCD , m∠CDA = m∠CDB , Option A , C and D

<h3>What is a Triangle ?</h3>

A triangle is a polygon with three sides , angles and vertices.

It is given a Δ ACB

CD is the angle bisector of ∠ACB

AC ≅ CB

To determine which statement are true

First it has to be proved that Δ DCB is congruent to Δ ACD

In the triangles

AC = CB (Given )

∠ACD = ∠DCB (CD is the angle bisector of ∠ACB)

DC = DC ( Common side )

thus Δ DCB is congruent to Δ ACD

Therefore the following statements are true

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Therefore Option A , C and D are the statements that are true .

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2 years ago