Most baseball cards today measure 2 1/2 inches by 3 1/2 inches. That's the size of a wallet-size photograph. But baseball cards weren't always that size. From 1952 to 1956, the Topps Company made cards that measured 2 5/8 by 3 3/4 inches. Then they changed the size to what we see today. 1. What was the perimeter of the old cards?

2. What is the perimeter of the new cards?

i  think is 55

Step-by-step explanation:

the 3rd on is correct

step-by-step explanation:

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;