According to data on the state of iowa, the amount of water used for cooking per household per month is normally distributed, with a standard deviation of 10.4 liters. a survey was carried out to estimate the population mean. with a sample size of 60 households, the mean quantity of water used for cooking was found to be 62.6 liters. there is a 95% chance that the population mean lies between liters and liters. nextreset

$53.50

step-by-step explanation:

you have to subtract the amount of money chuck earned ($72.50) by the cost of the gas for the mower ($11.25) and the new string for the trimmer he bought ($7.75).

72.50-11.25=61.25

and then subtract $61.25 by the second thing he bought (the new string for the trimmer)

61.25-7.75=53.5

so in total it's $53.50 (53 dollars and 50 cents)

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.