Question

by what number should (2)^-3 be multiplied to get 5​

Answer 1

Answer:

Step-by-step explanation:

Let the number to be multiplied by (2^-3) to get the answer 5 be ‘n'

Thus,

n × (2^-3) = 5

which means,

n × (1/8) = 5

Multiplying both LHS and RHS by 8, we get

8 × n × 1/8 = 5 × 8

That means,

n = 40.

Answer: We should multiply (2^ -3) by 40 to get 5.

Answer 2

Answer:

Step-by-step explanation:

(2)^-3 can be written as 1/(2)^3

1/(2)^3= 1/8

according to the question-

let the unknown no. = x

(2)^-3 × x =  5

⇒1/8 × x = 5

(transpose 1/8 to RHS)

⇒ x = 5÷ 1/8

x = 5× 8

⇒ x = 40

therefore we should multiply (2)^-3 with 40 to get 5

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hope it helps:))