Question

What is the value of
(
2
.
4
×
10
3
)
+
(
5
.
7
×
10
2
)
?
A.
2
.
97
×
10
2

B.
2
.
97
×
10
3

C.
8
.
1
×
10
5

D.
8
.
1
×
10
6

Answer 1

2.4×10^3 = 2400 and 5.7×10^2 = 570, so the sum is 2400 + 570 = 2970 = 2.97×10^3.

Answer: B.