Answer:
if im right its number 4!! if its not right sorry i did the math and thats what i got!!
Let the second no. be x
-3x = 21 → x = 21/-3 → x = -7
Answer: <
Step-by-step explanation:
2.48 < 2.53
Answer:
5.2 × 
Step-by-step explanation:
a number in scientific notation is expressed as
a × 
where 1 ≤ a < 10 and n is an integer
write 0.0052 as a number between 1 and 10, that is 5.2
we have to the move the decimal point 3 places to the left to retain it's value
3 places left means n is - 3
0.0052 = 5.2 × 