Im home schooled and teach myself. so i need some help with homework?

[Hailey]

5) Select the percent error for the measurement of 6 cm.
A) about 0.5%
B) about 5%
C) about 6.5%
D) about 8.3%

6) Find the minimum and maximum possible areas for a rectangle measured as 3 m × 7 m.
A) min: 16 m2; max: 27 m2
B) min: 16.25 m2; max: 26.25 m2
C) min: 16.5 m2; max: 26.5 m2
D) min: 16.75 m2; max: 26.75 m2

[hayharbr]

A measurement that rounds to 6 cm is anywhere from 5.5 cm to 6.5 cm so it could be off by as much as 0.5 cm. To get % error put the possible error over the measurement and convert to a percent.

0.5/6 = x/100

6x = 50
x = 50/6 = 8 1/3 % or 8.3333...%

So on 6, the maximum is is both numbers were rounded down from 3.5 x 7.5 which is 26.25

and minimum is if both were rounded up from 2.5 x 6.5 which is 16.25

Hope that helps!