Question

9. simplify
a) 7-3 ¹/² - 2 ¹/²
b) 3 ¹/⁸×2 ²/5×1 ³/5
c) 11.2×0.15÷⁴/⁵
d) 3 ³/6÷⁸/²¹×¹/²⁷

10. Arrange the following rational numbers in the descending order:

1) 2/-3, -4/9, -5/12, 7/-18

2) 3/-4, -5/12, -7/16, 9/-24


11. Simplify: 1) -2 + ( 3 / 8 ) + ( - 1 / 5 ) ,

2) (2/3) + (-7/11) + (-1/4)


12. From which number should (-11/4) be subtracted to give (-11/4)?​

Answer 1

Answer:

The insolation received by the earth is in short waves forms and heats up its surface. The earth after being heated itself becomes a radiating body and it radiates energy to the atmosphere in long wave form. This energy heats up the atmosphere from below. This process is known as terrestrial radiation :)

Answer 2

Answer:

thank you again for giving thanks