Question

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Answer 1

Refer to attachment✎

$\large \underline{ \boxed{ \sf \purple{ Important \: formula \: used}}}$

$\sf \large \: f = \frac{9}{5} c + 32$

This is very important formula to convert Celcius to Fahrenheit or Fahrenheit to celcius.

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This answer is not copied and is written by ThalaPro.

Answer 2

Answer:

Step-by-step explanation:

1) a) Cost of 11 pencil = rs 99.99

       cost of 1 pencil = Rs(99.99/11)

                                 = Rs 9.09

b) Cost of one pencil = Rs 7.5

   cost of 10 pencil = Rs (7.5*10)

                                = Rs 75

2)27 degree celcius = (27* 9/5) + 32

                                 = (5.4 * 9)+ 32

                                 = 48.6 + 32

                                 = 80.6

c) 42.825/2.5 = 17.13