Awater company
charges residential customers a quarterly flat fee of
$25 for up to 5000 gallons of water. the company
charges $10 per thousand for the first 10,000
gallons of water after the minimum allowance. the
next 10,000 gallons is $5 per thousand. all other
consumption over 25,000 gallons is $2.50 per
thousand
a. write a piecewise function w(x) that can be
used to determine a customer's quarterly bill for
using x gallons of water.

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)

a

step-by-step explanation:

rurbrbrjrnrbjr

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;