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balu736 [363]
3 years ago
13

Leah is studying a bacteria sample that increases 4 times in mass every day. At the end of day 1 of her study, the sample has a

mass of 4 milligrams. What is the mass of the bacteria sample after 6 days of study? Write each expression in the correct column of the table.
PLEASE HELP SERIOUSLY!! 8th grade math

Mathematics
2 answers:
Sever21 [200]3 years ago
4 0
After 6 days equation would be and answer
4^6 = 4096
to represent before 6 days just put 4^5=1024
givi [52]3 years ago
3 0

Answer:

Step-by-step explanation:

Given that Leah is studying a bacteria sample that increases 4 times in mass every day.

Let m(t) represent the mass after t days,

Given that m(1) = 4

Hence initial mass = m(0) = \frac{4}{4} =1

The general equation for m(t) would be

m(t) = 4^t\\

Hence after 6 days the mass of the bacteria

=4^6\\=4096 gm

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Answer:

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Step-by-step explanation:

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4 0
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Answer:

Step-by-step explanation:

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8 0
3 years ago
Please help meeeeee!!!!
ser-zykov [4K]
I think the answer is B y= 3x-7
8 0
3 years ago
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1.Write this sentence as an equation.Do not solve it.
Ivahew [28]

Problem 1

x = some unknown number

3x = three times a number

3x-7 = difference of three times a number and seven

2(3x-7) = two times the difference of three times a number and seven

2(3x-7) = x

The last equation is formed because the expression we built up is equal to the original number in question

<h3>Answer:  2(3x-7) = x</h3>

===========================================================

Problem 2

Use the distribution rule to get

3(2x+4)-2x

3*2x+3*4-2x

6x+12-2x

From here, we combine like terms. That means we combine the 6x and -2x to get 4x

So 6x+12-2x simplifies to 4x+12 and not 16x

How did she get 16x? Possibly because she mistakenly thought she could add 4x to 12 to get 16x. This only works if the 12 had x attached to it.

In other words, this is valid:  4x+12x = 16x but this is not 4x+12 = 16x

===========================================================

Problem 3

L = length = horizontal dimension = (d+15) ft

W = width = vertical dimension = (d-3) ft

P = perimeter of the rectangle = 108 ft

P = 2(L+W)

108 = 2(d+15+d-3)

108 = 2(2d+12)

108 = 4d+24

4d+24 = 108

4d = 108-24

4d = 84

d = 84/4

d = 21

The deep end is 21 feet long.

This means the overall horizontal length is d+15 = 21+15 = 36 feet and the the vertical width is d-3 = 21-3 = 18 feet

The overall dimensions of the rectangular pool are 36 ft by 18 ft

<h3>Answer:  d = 21</h3>
7 0
3 years ago
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