Can someone me out with this ? i suck at fractions the baseboard will not go across the doorway of the room which is 2 ¼ feet wide. a. taking into account the doorway, calculate the new length of baseboard needed for the room b. the hardware store sells the baseboards in 8 foot lengths. how many boards need to be purchased to install new baseboards in the room?

164 inches x = ft

147 inches x = ft

2ft =

Perimeter = 2L + 2w - 1doorway

                 = 2 + 2( -

                = + -

                = +

                 = +

                 = +

                 =

                = 49ft

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b) 49ft ÷ 8ft = 6.2

7 boards need to be purchased

4

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;