Q1- Insert three rational numbers between −1/4 and 0.
Q2- Find the smallest number by which 4000 must be multiplied to get a perfect square. Also
Find the square root of the obtained number.
Q3- What number should be subtracted from 2000 to get a perfect square number. Find the
Square root of the obtained number.
Q4- Find 41²
- 42².
Q5- Write in the scientific notation : 0.000000779.
Q6- Evaluate for x: 2x+1 = 64.
Q7- . The difference between the highest observation and the lowest observation is _________.
Q8- Find the relative frequency of 2 in the following data:
2,5,7,8,9,3,2,1,1,9,2
Q9- What is the class mark of the class interval 35-45.
please solve these all questions fast, I will mark as brainliest.
Answers
1)three rational number between -1/4 and 0 are ÷ -3/4 -2/4 -1/4
2)10 is the smallest number which should be multiplied to 4000 to get a perfect square.
10×4000=40000=200²
3)we have to subtract 64 from 2000 to make a perfect square.
2000-64=1936=44²
4)41²-42²= 1681-1746= -83
5)scientific notation=7.7×10^-7
6) 2x+1=64,2x=64-1=63,x=63/2=31.5
7)The difference between the highest and lowest observations in a given data is called its Range
8)frequency of 2 = 3
9)________
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