Daisy's friend calls her and asks her to meet at the park in exactly 40 minutes. Which method should Daisy use to most accurately determine when 40 minutes have passed? A. Daisy should use a stopwatch with minutes and seconds. B. Daisy should count the minutes in her head after she receives the call. C. Daisy should look at a clock that shows hours and minutes only. D. Daisy should use an hourglass and flip it over every time the sand runs out.

I'd say A since it would be easier to check instead of having to remember or count the time.

A

Step-by-step explanation:

B) Potential for human error and it takes too long to count in head

C) There is a huge gap between 1 hour and 1 minute

D) Inconvenient since it is an HOUR glass, and you can't tell when 40 minutes would be since the glass goes for a full 60 minutes

A) Best choice because there is less of a gap between a minute and a second, in comparison to an hour and a minute, therefore it is more accurate.

c-4 is the final answer! : )

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb