The first day, Brian saw 31 birds and twice as many squirrels as birds. The
second day, Brian saw 20 birds and 42 squirrels. Which of the following is a
good estimation of how many birds and squirrels Brian saw in the two days?
A. 110 birds and squirrels
B. 150 birds and squirrels
C. 190 birds and squirrels
D. 230 birds and squirrels
E 270 birds and squirrels

A. 110 birds and squirrels

Step-by-step explanation:

62+62=124

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;

y = i/2 xtnop + (3i/2 tnop+ 1)

step-by-step explanation:

the picture is the step by step explanation.