Answer:20cm
Step-by-step explanation:
85+85+85+85=340cm (Perimeter for the 85cm square).
110+110+50+50=320cm (Perimeter for the rectangle).
Working out the difference=340-320=20cm
Hope this helps! :))
Answer:
Ben receives 75%
Step-by-step explanation:
sum the parts of the ratio, 1 + 3 = 4 parts
Ben receives 3 parts of the 4 , that is
× 100%
= 0.75 × 100%
= 75%
Answer: (a)
(b) The best point estimate of is the sample mean
The margin of error = 4.552
Step-by-step explanation:
Given : The confidence interval for the population mean = (13.046 , 22.15)
Sample mean :
Standard deviation :
Sample size :
a. Let represents the population mean.
Then we can write the confidence interval for the population mean as :-
b. The best point estimate of is the sample mean
Also, the lower limit of confidence interval can be written as
i.e.
Hence, the margin of error = 4.552
Answer: B
it is B These samples are biased because the newspaper staff went to a basketball game, football game, and volleyball match to interview the students.
Step-by-step explanation: trust me tell me if i am wrong have a good day
Answer:
36
Step-by-step explanation:
(7+ )(7- )
this is in the form of a^2-b^2 formula
a^2-d^2=(a-b)(a+b).so write,
(7)^2-( )^2
=49-13
=36