To check the lifetime of a new battery in a soon‑to‑be‑released smart watch with GPS, an engineer used the GPS‑tracking feature of the watch continuously, beginning with a fully charged battery, until the battery was drained. The engineer repeated this for a total of 10 times. He compared the results with the lifetime of 4.8 hours for the current battery used in the company's GPS‑enabled smart watch. The described situation involves inference about a mean or means which involves: a. two independent samples.

b. a single sample.

c. a matched pairs design.

d. none of the choices.

$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)

i dont know if you cant find a way its best to actually add all of them start from 105 tho

step-by-step explanation:

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

happy to

pls mark as brainliest.