Question

A cellphone weighs about 2.8x10^n pounds. Which value of n is most reasonable?

A.) -3
B.) -2
C.) 0
D.) 1

Answer 1

The correct answer is B.) -1

Explanation:

I think we had different answer choices but for me It was B which is -1

Hope this helps!!

Answer 2

Approximate weight of cell phone is between 100 gm to 200 gm.

1 Pound = 0.45359237 Kilograms

= 0.4545 kg

2.8 pound = 2.8 × 0.4545

= 1.2727 Kg

It is given that weight of cell phone is
`2.8 * 10^n` pounds, means
`1.2727 * 10^n` Kilograms.

Which is equal to,
`1272.7 * 10^n` grams.

Because, 1 Kilogram = 1,000 gram

If, n=0

Weight of cell phone = 1272.7 grams=1.2727 Kg

when, n=1

Weight of cell phone = 12727 grams=12.727 Kg

n= -2,

Weight of cell phone = 12.727 grams

n=- 3

Weight of cell phone = 1.2727 grams

None, of the weights are appropriate weight of cell phone.Neither of four options provided here is true.