7/40 abx i think thats the answer
The margin of error is 0.97849
we are given
mean=235
so,

standard deviation =7.5
so,

we know that
ME=2*standard error
and

If confidence level is 95%, then we can multiply by 1.96
so, we can multiply by 2 to get ME
now, we can use marginal error formula

now, we can plug values
and we get


8.6x + 3 + 8.6+3 =. 17.2x + 6
5.2+5.2= 10.4
17.2x + 6 = 10.4
Hello There!
First work out the number of shelves per bookcase:
65/13 = 5
It is 5 shelves per bookcase.
6 x 5 = 30.
Therefore 32 shelves are enough to make 6 bookcases.
Hope This Helps You!
Good Luck :)
- Hannah ❤