Answer:

Step-by-step explanation:
21 trillion =
21,000,000,000,000 =
21 followed by 12 zeros =

Answer:
The Perimeter is 4.5in and the Area is 1.125in²
Step-by-step explanation:
Perimeter is gotten by adding up the length/height of every side of the polygon (1.5in + 1.5in + 0.75in + 0.75in), while the Area of a rectangle is gotten by multiplying the height and length. (1.5in × 0.75in)
Answer:
A i think
Step-by-step explanation:
3 hundreds + 7 hundreds = 1 thousand
300 + 700 = 1000