Answer:
-2.7 ×10²
Step-by-step explanation:
Scientific notation is the way to express the large value in short form.
The number in scientific notation have two parts.
. The digits (decimal point will place after first digit)
× 10 ( the power which put the decimal point where it should be)
for example the number 6324.4 in scientific notation will be written as = 6.3244 × 10³
Given measurements = 4.3×10² - 7.0 ×10²
= -2.7 ×10²