There are many ways to answer this question, but one example is 13 + 70 = 83
Answer:
Step-by-step explanation:
How to write numbers in standard form:
Write the first number 8.
Add a decimal point after it: 8.
Now count the number of digits after 8. There are 13 digits.
So, in standard form: 81 900 000 000 000 is 8.19 × 10¹³
Answer:
600ft square
Step-by-step explanation:
Lets multiply all numbers given by 10 beacuse they represent 10 ft
20ft*30ft=600ft square` the area of living room
25ft*20ft=500ft square` the area of bedroom
Answer:
.4
Step-by-step explanation:
Use a caluculator