Answer:
Step-by-step explanation:
Given that in order to efficiently bid on a contract, a contractor wants to be 95% confident that his error is less than two hours in estimating the average time it takes to install tile flooring.
Std deviation =4.5 errors
95% confidence interval = Mean±1.96*std dev
Hence we have
Sample size should be 20.
691/1000 is already in its simplest form, for 691 is a prime number and it cannot be reduced by any number other than 1 and 691. (and 1000 is not divisible by 691 also)
691/1000 in its simplest form is 691/100~
Answer:
median number of snow days is 4
Step-by-step explanation:
Listed in order from least to greatest:
2
3
3
3
4
5
6
7
8
There are 9 numerals on this list. Because this count is odd, the median is simply the middle value, which here is 4. This is the median number of snow days.
Ok so ratios
john casts a shadow of 180 when he is 180
therefor shadowheight=realheight
320shadowheight=realheight
realheight=320centimeters
Answer:
Most likely Perimeter of the pad is 42 ft.
Step-by-step explanation:
Area of the Cement pad = 108 feet²
Length of the dumpster = 9 ft
Width of the dumpster = 8 ft
Cement pad surface is greater than dumpster to hold it.
Area of pad = 108 ft²
length × width = 108
we choose length and width such that they are greater than length and width of the dumpster.
So, length of the pad = 12 ft
Width of the pad = 9 ft
Thus, Perimeter = 2 × (length + width) = 2 × ( 12 + 9 ) = 2 × 21 = 42 ft
Therefore, Most likely Perimeter of the pad is 42 ft.
