1. which of the equations below could be used to find the radius of a dinner plate whose area is 255 square inches?

255 = r2
255 =
255 = 2 r

2. which of the following is the best approximation of the area of a circle whose diameter is 14 feet?

44 square feet
88 square feet
154 square feet
616 square feet

3. the spray from a sprinkler creates a circle with a radius of 15 feet. which of the following is the best approximation of how many square feet of grass the sprinkler covers?

47
94
225
707

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;

94

step-by-step explanation:

average the numbers and use a variable to figure out the minimum to get a 90.

(79+94+91+92+x)/5=90

x = 94