Can a set of measurements be precise but not accurate? explain.

Yes, the unit of measurement can be precise but not accurate. Precision is referred as the closeness of two measurements to one another while accuracy refers to the closeness of the measurement from the standard or known value. Precision is independent from accuracy and may not be accurate. A measurement can be accurate but can also be imprecise.

A) 20 in

B) 26 in and it got bigger by 1.3 times

C) 40 in and it got bigger by 2 times

Step-by-step explanation:

A) so the formula for finding perimeter is P= 2(L+W) so its (3+7)*2 = 20

B) if you double 3, 3*2=6 then it is 2*(6+7) = 26. 26/20= 13/20= 1.3 times more

C) if you double 3, 3*2=6 and 7, 7*2= 14 then it is (14+6)*2 = 40. 40/20=2/1 = 2 times more.

Also i couldnt solve D for you but try to solve it using what I wrote below.

Hope it helps :)