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Serga [27]
3 years ago
5

Write 225,120,000 in scientific notation

Mathematics
1 answer:
ivolga24 [154]3 years ago
4 0
2.2512*10^8 let me know if its wrong
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Solve using substitution.<br><br> 3x + 8y = 19<br> y = 2<br><br> ( , )
satela [25.4K]
3x + 8(2) = 19, 3x + 16= 19 , 3x=3 , x =1
4 0
3 years ago
Read 2 more answers
Given m∥n, find the value of x.
kicyunya [14]

Answer:

42

Step-by-step explanation:

Given m and n are parallel:

x + 138 = 180 because these angles are supplementary

subtract 138 from both sides

x = 42

6 0
2 years ago
What’s the median of 2, 4, 5, 7 ,7 , 15
Tresset [83]

Answer:

6

Step-by-step explanation:

the middle number of the given list

7 0
3 years ago
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A certain test preparation course is designed to help students improve their scores on the LSAT exam. A mock exam is given at th
Natalija [7]

Answer:

Step-by-step explanation:

given that a certain  test preparation course is designed to help students improve their scores on the LSAT exam. A mock exam is given at the beginning and end of the course to determine the effectiveness of the course. The following measurements are the net change in 6 students' scores on the exam after completing the course:

We find

Mean 13.66666667  = 13.7

Standard Error 1.801234145

Margin of error for 90% = 1.645*std error = 2.963

Confidence interval = Mean ±Margin of error

=(10.704, 16.630)

Sample mean = 13.7

6 0
3 years ago
A kcl elixir contains 10 meq/15 ml the daily dose is 30 meq how many mls are needed for a 30 day supply
BlackZzzverrR [31]
First you need to set this problem up as a cross multiply fraction set (actually forgot the name of it so I described it as that).

10/15 * 30/x

Solve for X

450 = 10x

Simplify

45 = x

The Daily dose is 30 meq/45 ml. For a 30 day supply you just multiply by 30.

1350 ml is needed for a 30 day supply.
6 0
3 years ago
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