700/10=70
140/70=2
A heart beats 70 beats a minute
It takes 2 min to beat 140 times
Answer:
The Population Density is 
.
Step-by-step explanation:
Given,
Total number of People = 900,000
Total Land Area = 1800 sq. mi.
Solution,
For calculating the population density, we have to divide the total number of people by the area of the land.
This can be framed in equation form'
Now putting the given values, we get;
Hence The Population Density is .
Answer:
i 25000 cause 250×100 is 25000 ii. 100 cause 10×10 is 100
Step-by-step explanation:
about ii it didnt say anything like the quantity but thats for one tile
Answer:
- 1/4
Step-by-step explanation:
Where you see X, substitute with 1/3
Solve the power/exponent first:
6(1/3) = 2
That is ; - 4(1/4)^2
Solve the parenthesis:
(1/4)^2 = 1/16
-4(1/16)
= - 1/4
Answer:
Formula for mean in grouped data
= Zfx/ Zf
f = sum of the number of mice
= 35
Frequency = 39 + x
Mean = 7
Fx = 20 + 78 + 112 + 8x + 54
= 264 + 8x
7 = 264 + 8x/ 39 + x
7(39+x) = 264 + 8x
After solving you will get
x = 9
Hope this helps.
