We have: 1000 = \(2^3.5^3\)\(=20.2.5^2⋮20\)

=> 1000 : 2 \(⋮\) 20

1000 : 5 \(⋮\) 20

1000 : 2 x 5 \(⋮\) 20

1000 : \(\left(2.5^2\right)⋮\) 20

So there are 5 factors of 1000 can be divided by 20 without a remainder.

11 inches tall after burning for 4 hours

8 inches tall after burning for 6 hours

\(\Rightarrow\) Every 6 - 4 = 2 hours the candle was 11 - 8 = 3 inches shorter

\(\Rightarrow\) After 4 hour the candle was 6 inches shorter

\(\Rightarrow\) The candle was: 11 + 6 = 17 (inches) tall

a. .0001 means 0.0001

b. \(\dfrac{1}{1000}=0.001\)

c. .100 = 0.1 so -.100² = -0.1² = -0.01

d. \(\dfrac{1}{10^4}=0.0001\)

e. \(\dfrac{1}{10}\div.1=\dfrac{1}{10}\div0.1=1\)

SO e has the largest value

Conandtb spam 

A notebook costs: 16.80 : 8 = 2.10 ($)

A pen costs: 15.25 : 5 = 3.05 ($)

Anna buys: 2.10 x 4 + 3.05 x 8 = 8.40 + 24.40 = 32.80 ($) 

Anna received: 2 x 20 - 32.80 = 7.20 ($)

Benny buys: 5 x 2.10 + 10 x 3.05 = 10.50 + 30.50 = 41 ($)

Benny received: 2 x 20 - 41 = -1 ($) 

=> Anna received more and more than: 7.20 + 1 = 8.20 ($)

A notebook costs: 16.80 : 8 = 2.10 ($)

A pen costs: 15.25 : 5 = 3.05 ($)

Anna buys: 2.10 x 4 + 3.05 x 8 = 8.40 + 24.40 = 32.80 ($) 

Anna received: 2 x 20 - 32.80 = 7.20 ($)

Benny buys: 5 x 2.10 + 10 x 3.05 = 10.50 + 30.50 = 41 ($)

Benny received: 2 x 20 - 41 = -1 ($) 

=> Anna received more and more than: 7.20 + 1 = 8.20 ($)

3a + 8|a| = (-3)|a|+8|a|

=\([(-3)+8]\)|a|

=5|a|

Peter has the stamp number is:

          40 + 7 = 47 (stamps)

             Answer : 47 stamps

Peter có con tem là:

          40 + 7 = 47 (tem)

             Trả lời: 47 tem

repair:Nam có 40 stmaps. Peter has more Nam 7 samps. how many stmaps does nam have

peter has

40+7=47 stamps

answer 47stamps

AP Statistics: The Best Test Preparation for the Advanced Placement Exam - Jack J. Berger, Research and Education Association - Google Sách

The solution weighs : 17 + 3 = 20 (g)

The percentage of salt in the solution obtained is : \(\dfrac{3.100}{20}\%=15\%\)

The  prime numbers less than 100 have a units digit of 3 are : 3;13;23;43;53;73;83. => There are 7 numbers.

The total prime numbers less than 100 : 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97

The percent is : \(\dfrac{7}{25}\cdot100\%=28\%\)