Câu 1: Trong các mệnh đề sau, mệnh đề nào là không đúng ? A. Nếu a // b và (α) vuông góc a thì (α) vuông góc với b

B. Nếu (α) // (β) và a vuông góc với (α) thì a vuông góc với (β)

C. Nếu a và b là hai đường thẳng phân biệt và a vuông góc (α), b vuông góc với (α) thì a // b

D. Nếu a // (α) và b vuông góc a thì b vuông góc (α)

Hey can you ask this question in English so I can no answer this question in English and then you can convert that my answer in your language as you're I'm Indian so I don't know this language

Step-by-step explanation:

Please don't you think that I'm doing this for points I think I should know this question so can you please answer this you're this and English

here the number -5 is all of the following except a rational number.

step-by-step explanation:

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.