Question

Two percent of Jennie’s skin cells were burned when she escaped from a fire. If 3.7×10^10 of her skin cells were burned then, how many skin cells were not burned?

Answer 1

`1813*10^9` cells were not burnt when Jennie escaped from the fire.

Solution:

Given:

2% of skin cells were burnt i.e,
`3.7*10^(10)` of skin cells were burnt.

To find:

Number of skin cells that were not burnt

We can write
`3.7*10^(10) \text{ as } 37*10^(9)`

Therefore, by equating the values we get,

2% of the cell is
`37*10^9`

1% of the cell is
`(37*10^9)/(3)=18.5*10^9`

As, 1% of the cell is
`18.5*10^9`

98% of the cell will be
`98*18.5*10^9=1813*10^9`

`\therefore \text{ skin cells that are not burnt is } 1813*10^9`