Acopy center offers its customers to different pricing plans for black and white photo copies of 8.5 in. by 11 in. pages customers can either pay $0.08 per page or pay $7.50 for a discount card that lowers the cost two$0.05 per page right and solve an equation to find the number of photocopies for which the cost of each plan is the same.

0.08x = 0.05x + 7.5  Subtract 0.05x from both sides

-0.05x    -0.05x

0.03x  = 7.5  divide both sides by 0.03

x = 250

at 250 copies its the same price

(note:   after 250 the second is cheaper and before 250 the first option is cheaper)

there will be 35 boys in each team. : )

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;