Explanation:
Q1
A. x must be 0
B. x can be any number. it because every number times by 0 will be 0
Q2
(2⁸ . 5-⁵ . 19⁰)-² . (5-²/2³)⁴ . 2²⁸ =
2-¹⁶ . 5¹⁰ . 1 . 5-⁸ . 2-¹² . 2²⁸ =
2-¹⁶-¹²+²⁸ . 5¹⁰-⁸ =
2⁰ + 5² = 25
Q3
4.55 x 10¹³ - 1.78 x 10¹² =
45.5 x 10¹² - 1.78 x 10¹² =
43.72 x 10¹²
4,37 x 10¹³ kg
Q4
A. 3.9 x 10³³ ergs/s x 2.45 x 10⁵ s = 9.555 x 10³⁸
or in scientific we can write 9.56 x 10³⁸ ergs
B. 7.4 x 10-³ mm. Because the blood cell is a tiny part in.our body. it's impossible to have a cell blood of 7.4 x 10³ mm or 7.4 meters in diameter