7. a model of a house is shown. what is the
perimeter of the model?
16 - 2x
7x + 11
13x – 4
a. 18x – 23
b. 31x – 14
c. 23x + 50
d. 36x + 46

Correct answer choice is:

C. A stopwatch

Explanation:

The best a decent eye will do is fix a reading to one tenth of a second, that is so the design of the stopwatch. The digital stopwatch has 2 digits on the far side the seconds, thus it further separates the time in hundredths of a second. Since it's simple to scan to hundredth of a second, that's its design.