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Alona [7]
3 years ago
13

Explain what happens to the decimal point each time we multiply a decimal number by 10? ​

Mathematics
1 answer:
marysya [2.9K]3 years ago
7 0

Answer: the decimal will move over to the right one place.

Step-by-step explanation:

When you multiply a decimal, then you are adding a tens place to it, so any decimal you multiply by ten, the decimal will move to the right one place. For example: 2.05 multiplied by 10 equals 20.5.

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Exponential growth can anyone give the answers to me? I’m completely lost!
PilotLPTM [1.2K]

Answer:

Q1

<u>The exponential growth model for frogs:</u>

  • F(x) = 100(1.22)ˣ,

F- number of frogs, x- number of years, 1.22 - growth factor

<u>Calculations</u>:

  • F(5) = 100(1.22)⁵ = 270
  • a) F(10) = 100(1.22)¹⁰ = 730
  • b) F(20) = 100(1.22)²⁰ = 5335  

<em>All numbers rounded </em>

Q2

<u>The exponential growth model for bacteria:</u>

  • B(x) = 10(1.8)ˣ

B- number of bacteria, x- number of hours, 1.8 - growth factor

<u>Calculations:</u>

  • a) B(5) = 10(1.8)⁵ = 189
  • b) B(24) = 10(1.8)²⁴ = 13382588
  • c) B(168) = 10(1.8)¹⁶⁸ = 7.68 * 10⁴³

<em>All numbers rounded </em>

Q3.

<u>The exponential growth model for fish:</u>

  • F(x) = 821(1.02)ˣ,

F- number of fish, x- number of months, 1.02 - growth factor

<u>Calculations:</u>

  • a) F(12) = 821(1.02)¹² = 1041
  • b) F(120) = 821(1.02)¹²⁰ = 8838

<em>All numbers rounded </em>

3 0
3 years ago
Read 2 more answers
An experiment involves 17 participants. From these, a group of 3 participants is to be tested under a special condition. How man
lakkis [162]

Answer: 680

Step-by-step explanation:

When order doesn't matter,then the number of combinations of choosing r things out of n = ^nC_r=\dfrac{n!}{r!(n-r)!}

Given: Total participants = 17

From these, a group of 3 participants is to be tested under a special condition.

Number of groups of 3 participants chosen = ^{17}C_3=\dfrac{17!}{3!(17-3)!}\

^{17}C_3=\dfrac{17!}{3!(17-3)!}\\\\=\dfrac{17\times16\times15\times14!}{3\times2\times14!}\\\\=680

Hence, there are 680 groups of 3 participants can  be chosen,.

8 0
4 years ago
A recipe for chocolate chip cookies calls for 1 1/4 cups of flour. If you are making 2 1/4 recipes, how many cups of flour are n
Studentka2010 [4]

Answer:

you need 2.8125 cups

Step-by-step explanation:

1 1/4 times 2 1/4 is 2.8125

5 0
3 years ago
Read 2 more answers
*WILLL GIVE BRAINIEST TO COORECT RESPONCE*<br> how do i do this?<br> what is the answer?
Sergio [31]

Answer:

line mo

Step-by-step explanation:

Because the triangle are congrument

RST and MNO are the triangle

RT is a line in the RST triqangle

it is equal to the MO line in MNO

3 0
3 years ago
Pleas help me.<br>simplify​
Viktor [21]

Answer:

20/9     2.2     2 2/9

hope this helps

4 0
3 years ago
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