Question

During his trip, sara knits a bright, oranges scarf at the rate of 469 mm every hour. If her trip last 8 days and if sara sleeps only 5 hours a day, how much of the scraf will she knitted by the end of the trip?

Answer 1

Answer:

The amount of scarf she knits at the end of the trip is:

                    71288 mm.

Step-by-step explanation:

The rate at which the scarf is knitten is: 469 mm/hour

If her trip last 8 days and if sara sleeps only 5 hours a day

This means that the number of hours per day she knits the scarf per day is:

24-5=19 hours.

Also, it is done for 8 days.

This means that the total number of hour she knits the scarf is:

19×8=152 hours

Also, the length of the scarf that she knits is:

 Rate at which she knits × Total number of hours

=   469×152

=  71288 mm

Answer 2

For this case, the first thing we must do is define variables.

We have then:

x: number of hours

y: Amount of scarf that Sara knits

We then have the following equation that models the problem:

$y = 469 (x - 40)$

The number of hours during the 8 days is given by:

$x = 8 * (24-5)\\x = 152$

Substituting the value of x in the ada equation we have:

$y = 469 (152 - 40)\\y = 52528$

Answer:

she will knitted by the end of the trip about 52528mm of scarf