Answer:
a. L.B. = 20.5
b. U.B. = 21.5
Step-by-step explanation:
Length is measured 21 cm correct to 2 significant figures
a. Lower bound of 21
= 20.5 < 21
= 20.5
b. Upper bound of 21
= 21 < 21.5
= 21.5
Answer:
number one is the appropriate answer for this question
This is a simple consequence of the Zero-sum problem: https://en.wikipedia.org/wiki/Zero-sum_problem
Answer:
6000
Step-by-step explanation:
Divide top and bottom by the common factor.

Simplify
3 × 2000 = 6000
2•3=9 2•2=4 2•2=4 9+4+4=17 the answer is 17